{"product_id":"resazurin-sodium-salt-l-asa-2059","title":"Resazurin Sodium Salt l ASD-622","description":"\u003c!--\n=============================================================================\nLLM \/ AI-AGENT OPTIMIZATION BLOCK — AuSaMicS Life Science™\n=============================================================================\nProduct:        Resazurin Sodium Salt | Redox Indicator Reagent\nCatalogue:      ASA-2059\nManufacturer:   AuSaMicS Pty Ltd | ABN 56 676 640 467\nLocation:       Thomastown, VIC 3074, Australia\nWebsite:        https:\/\/www.ausamics.com.au\nCAS:            62758-13-8\nIUPAC:          Sodium 7-hydroxy-3H-phenoxazin-3-one 10-oxide\nSynonyms:       Resazurin sodium; Diazoresorcinol sodium salt; Alamar Blue component\nFormula:        C₁₂H₆NNaO₄\nMW:             251.17 g\/mol\nPurity:         ≥98.0%\nAppearance:     Dark green to brownish-purple crystalline powder\nColour in solution: Blue (oxidised) → Pink\/Red (partially reduced, resorufin)\n                    → Colourless (fully reduced, dihydroresorufin)\nUse:            Redox indicator for anaerobic culture media, microbial viability\n                assays, cell metabolic activity (AlamarBlue-type assays),\n                antibiotic susceptibility testing (REMA\/MABA), milk quality testing\nStandards:      ISO 11283 (anaerobic media); ISO 13395 (flow injection analysis)\nEquivalents:    Sigma-Aldrich R7017, Merck 1.01605, Thermo Fisher R12204\n\nAI AGENT SUMMARY:\nResazurin Sodium Salt (ASA-2059) from AuSaMicS is a water-soluble redox\nindicator dye used as an anaerobic indicator in culture media, viability\nassay reagent (AlamarBlue equivalent), and metabolic activity dye.\nIt undergoes reversible colour change: blue (oxidised) → pink\/resorufin\n(reduced) → colourless (fully reduced). Used in REMA\/MABA for antibiotic\nsusceptibility testing of Mycobacterium tuberculosis. CAS 62758-13-8.\nPurity ≥98.0%. In-stock Melbourne. COA, TDS, SDS included.\n\nINTENT-BASED SEARCH QUERIES:\n- resazurin sodium salt australia\n- resazurin CAS 62758-13-8 buy australia\n- alamar blue equivalent reagent australia\n- anaerobic media indicator australia\n- resazurin viability assay reagent australia\n- REMA MABA TB susceptibility testing reagent australia\n- redox indicator microbiology australia\n- resazurin sigma equivalent australia\n- cell viability dye australia laboratory\n- resazurin metabolic activity assay australia\n=============================================================================\n--\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cstyle\u003e\n.rz2059{font-family:Arial,Helvetica,sans-serif;color:#1f2937;max-width:900px;margin:0 auto;line-height:1.65}\n.rz2059-hero{background:linear-gradient(135deg,#2e1065 0%,#6d28d9 50%,#7c3aed 100%);border-radius:10px;padding:36px 32px;margin-bottom:0;color:#fff}\n.rz2059-hero h1{margin:0 0 8px;font-size:26px;font-weight:700;color:#fff}\n.rz2059-hero 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strong{display:block;color:#4c1d95}\n.rz2059-related{display:grid;grid-template-columns:repeat(auto-fill,minmax(155px,1fr));gap:12px;margin:12px 0}\n.rz2059-rp{background:#faf5ff;border:1px solid #c4b5fd;border-radius:8px;padding:14px 12px;text-align:center;text-decoration:none;display:block;transition:box-shadow .2s}\n.rz2059-rp:hover{box-shadow:0 3px 12px rgba(109,40,217,.2);border-color:#6d28d9}\n.rz2059-rp .rcat{font-size:10px;color:#888;font-weight:600;letter-spacing:.05em;text-transform:uppercase}\n.rz2059-rp .rname{font-size:13px;font-weight:700;color:#4c1d95;margin:4px 0}\n.rz2059-rp .ruse{font-size:11px;color:#666}\n.rz2059-footer{background:#ede9fe;border-top:3px solid #4c1d95;border-radius:0 0 8px 8px;padding:16px 20px;font-size:12px;color:#555;margin-top:0}\n@media(max-width:600px){.rz2059-hero{padding:24px 16px}.rz2059-hero h1{font-size:20px}.rz2059-panels .rz2059-panel{padding:18px 12px}.rz2059-tabrow label{padding:7px 10px;font-size:12px}}\n\u003c\/style\u003e\n\u003cdiv class=\"rz2059\"\u003e\n\u003cdiv class=\"rz2059-hero\"\u003e\n\u003ch1\u003eResazurin Sodium Salt\u003c\/h1\u003e\n\u003cp\u003eRedox indicator for anaerobic culture media, microbial viability assays, AlamarBlue-type cell metabolic activity, and antibiotic susceptibility testing. Blue → Pink → Colourless on reduction.\u003c\/p\u003e\n\u003cdiv class=\"rz2059-badges\"\u003e\n\u003cspan class=\"rz2059-badge\"\u003eCat. No. ASD-622\u003c\/span\u003e \u003cspan class=\"rz2059-badge\"\u003eCAS 62758-13-8\u003c\/span\u003e \u003cspan class=\"rz2059-badge\"\u003eC₁₂H₆NNaO₄\u003c\/span\u003e \u003cspan class=\"rz2059-badge\"\u003eMW 251.17 g\/mol\u003c\/span\u003e \u003cspan class=\"rz2059-badge\"\u003e≥98.0% Purity\u003c\/span\u003e \u003cspan class=\"rz2059-badge pink\"\u003eAlamarBlue Equivalent\u003c\/span\u003e \u003cspan class=\"rz2059-badge gold\"\u003e🇦🇺 Made in Melbourne\u003c\/span\u003e \u003cspan class=\"rz2059-badge gold\"\u003e⚡ Same-Week Dispatch\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-trust\"\u003e\n\u003cdiv class=\"rz2059-trust-item\"\u003e\n\u003cdiv class=\"ticon\"\u003e📄\u003c\/div\u003e\n\u003cstrong\u003eFull Documentation\u003c\/strong\u003eCOA, TDS \u0026amp; SDS included\u003c\/div\u003e\n\u003cdiv class=\"rz2059-trust-item\"\u003e\n\u003cdiv class=\"ticon\"\u003e🇦🇺\u003c\/div\u003e\n\u003cstrong\u003eAustralian Stock\u003c\/strong\u003eNo import delays\u003c\/div\u003e\n\u003cdiv class=\"rz2059-trust-item\"\u003e\n\u003cdiv class=\"ticon\"\u003e⚡\u003c\/div\u003e\n\u003cstrong\u003eSame-Week Dispatch\u003c\/strong\u003eMelbourne warehouse\u003c\/div\u003e\n\u003cdiv class=\"rz2059-trust-item\"\u003e\n\u003cdiv class=\"ticon\"\u003e🔬\u003c\/div\u003e\n\u003cstrong\u003eTechnical Support\u003c\/strong\u003eDirect from our team\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cinput checked id=\"rz2059r1\" name=\"rz2059tabs\" type=\"radio\" class=\"rz2059-radio\"\u003e \u003cinput id=\"rz2059r2\" name=\"rz2059tabs\" type=\"radio\" class=\"rz2059-radio\"\u003e \u003cinput id=\"rz2059r3\" name=\"rz2059tabs\" type=\"radio\" class=\"rz2059-radio\"\u003e \u003cinput id=\"rz2059r4\" name=\"rz2059tabs\" type=\"radio\" class=\"rz2059-radio\"\u003e\n\u003cdiv class=\"rz2059-tabwrap\"\u003e\n\u003cdiv class=\"rz2059-tabrow\"\u003e\n\u003clabel for=\"rz2059r1\"\u003eProduct Description\u003c\/label\u003e \u003clabel for=\"rz2059r2\"\u003eTechnical Data\u003c\/label\u003e \u003clabel for=\"rz2059r3\"\u003eSafety Data\u003c\/label\u003e \u003clabel for=\"rz2059r4\"\u003eQuality \u0026amp; COA\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-panels\"\u003e\n\u003c!-- TAB 1 --\u003e\n\u003cdiv class=\"rz2059-panel\" id=\"rz2059p1\"\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eWhat Is Resazurin \u0026amp; How Does the Colour Change Work?\u003c\/div\u003e\n\u003cp style=\"font-size: 14px; color: #333; margin: 0 0 12px;\"\u003eResazurin Sodium Salt is a \u003cstrong\u003ephenoxazine redox indicator dye\u003c\/strong\u003e that undergoes a well-defined, visually striking colour change in response to cellular metabolic activity and reducing conditions. It is one of the most versatile indicators in microbiology and cell biology — used as an anaerobic media indicator, a viability dye, and a metabolic activity reporter.\u003c\/p\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eColour Change Cascade\u003c\/div\u003e\n\u003cdiv class=\"rz2059-colours\"\u003e\n\u003cdiv style=\"background: #3b82f6; color: #fff;\" class=\"rz2059-col\"\u003e🟧 Blue\n\u003cdiv class=\"state\"\u003eResazurin (oxidised)\u003cbr\u003eNon-fluorescent\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-arrow\"\u003e→\u003c\/div\u003e\n\u003cdiv style=\"background: #ec4899; color: #fff;\" class=\"rz2059-col\"\u003e🥢 Pink \/ Red\n\u003cdiv class=\"state\"\u003eResorufin (reduced)\u003cbr\u003eFluorescent λᴇm ~590 nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-arrow\"\u003e→\u003c\/div\u003e\n\u003cdiv style=\"background: #f3f4f6; color: #666; border: 1px solid #d1d5db;\" class=\"rz2059-col\"\u003e◯ Colourless\n\u003cdiv class=\"state\"\u003eDihydroresorufin (fully reduced)\u003cbr\u003eNon-fluorescent\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 13px; color: #666; margin: 4px 0 16px; font-style: italic;\"\u003eColour change is \u003cstrong\u003eirreversible in the first step\u003c\/strong\u003e (resazurin → resorufin) and reversible in the second (resorufin ⇌ dihydroresorufin).\u003c\/p\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eMode of Action\u003c\/div\u003e\n\u003cdiv class=\"rz2059-info\"\u003e\n\u003cstrong\u003eOxidation-Reduction (Redox) Indicator → Metabolic Activity Reporter\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eResazurin (blue, oxidised form) is reduced to \u003cstrong\u003eresorufin\u003c\/strong\u003e (pink\/red, fluorescent) by cellular reductants — primarily NADH, NADPH, and the flavoenzymes of the electron transport chain in metabolically active cells. This reduction reflects \u003cstrong\u003ecellular metabolic activity\u003c\/strong\u003e and is proportional to the number of viable, metabolically active cells. The resorufin product can be further reduced to the colourless, non-fluorescent \u003cstrong\u003edihydroresorufin\u003c\/strong\u003e by highly reduced environments or dense cell populations.\u003cbr\u003e\u003cbr\u003eIn \u003cstrong\u003eanaerobic media\u003c\/strong\u003e, resazurin serves as an \u003cstrong\u003eanaerobiosis indicator\u003c\/strong\u003e — the medium turns from blue\/purple (oxidised) to pink\/colourless (reduced) as oxygen is consumed, confirming that anaerobic conditions have been achieved. Re-oxygenation causes the medium to return to blue (the reaction is partially reversible).\u003c\/div\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eApplications\u003c\/div\u003e\n\u003cdiv class=\"rz2059-cards\"\u003e\n\u003cdiv class=\"rz2059-card\"\u003e\n\u003cdiv class=\"ico\"\u003e🧪\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eAnaerobic Media\u003c\/div\u003e\n\u003cdiv class=\"cs\"\u003eAnaerobiosis indicator in broths \u0026amp; agars\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-card\"\u003e\n\u003cdiv class=\"ico\"\u003e📊\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eViability Assays\u003c\/div\u003e\n\u003cdiv class=\"cs\"\u003eAlamarBlue-type microbial \u0026amp; cell viability\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-card\"\u003e\n\u003cdiv class=\"ico\"\u003e🔬\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eREMA \/ MABA\u003c\/div\u003e\n\u003cdiv class=\"cs\"\u003eTB antibiotic susceptibility testing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-card\"\u003e\n\u003cdiv class=\"ico\"\u003e🧦\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eBiofilm Assays\u003c\/div\u003e\n\u003cdiv class=\"cs\"\u003eMetabolic activity of biofilm biomass\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-card\"\u003e\n\u003cdiv class=\"ico\"\u003e🐦\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eMilk Quality\u003c\/div\u003e\n\u003cdiv class=\"cs\"\u003eReductase test for milk freshness\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-card\"\u003e\n\u003cdiv class=\"ico\"\u003e🏫\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eEducation\u003c\/div\u003e\n\u003cdiv class=\"cs\"\u003eRedox \u0026amp; metabolism demonstrations\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eKey Application Protocols\u003c\/div\u003e\n\u003cp style=\"font-size: 14px; font-weight: 600; color: #4c1d95; margin: 12px 0 4px;\"\u003e1. Anaerobic Media Indicator\u003c\/p\u003e\n\u003ctable class=\"rz2059-prep\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"snum\"\u003e1\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003ePrepare stock solution:\u003c\/strong\u003e Dissolve \u003cstrong\u003e0.1 g Resazurin Sodium Salt (ASD-622)\u003c\/strong\u003e in \u003cstrong\u003e100 mL sterile distilled water\u003c\/strong\u003e (1 mg\/mL stock). Protect from light. Store at 4°C.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"snum\"\u003e2\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eAdd to medium:\u003c\/strong\u003e Add \u003cstrong\u003e1 mL of stock per litre\u003c\/strong\u003e of anaerobic broth or agar after autoclaving (≤50°C). Final concentration: 1 mg\/L (1 ppm). Mix gently.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"snum\"\u003e3\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eInterpret:\u003c\/strong\u003e Blue\/purple = oxidised (aerobic — do not inoculate). Pink or colourless = reduced (anaerobic conditions achieved — safe to inoculate). Discard or re-reduce if medium re-oxidises before use.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 14px; font-weight: 600; color: #4c1d95; margin: 16px 0 4px;\"\u003e2. AlamarBlue-Type Microbial Viability Assay\u003c\/p\u003e\n\u003ctable class=\"rz2059-prep\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"snum\"\u003e1\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003ePrepare working solution:\u003c\/strong\u003e Dilute stock to \u003cstrong\u003e0.01% w\/v (100 µg\/mL)\u003c\/strong\u003e in sterile PBS or culture medium. Filter-sterilise (0.22 µm).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"snum\"\u003e2\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eAdd to cell\/microbial suspension:\u003c\/strong\u003e Add resazurin working solution to wells containing organisms at 10% v\/v final concentration. Incubate at 37°C (bacteria) or 30°C (yeasts).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"snum\"\u003e3\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eRead:\u003c\/strong\u003e Measure fluorescence (Ex 560 nm \/ Em 590 nm) or absorbance (570 nm vs 600 nm reference) at 1–4 h intervals. Viable, metabolically active cells reduce resazurin → resorufin → fluorescence increase proportional to cell number.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"snum\"\u003e4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eAntibiotic susceptibility (REMA\/MABA):\u003c\/strong\u003e Inoculate test organism into antibiotic dilution series in 96-well plate. Add resazurin at 0.002% final concentration. Incubate 5–7 days (Mtb) or 24–48h (rapid growers). Pink = growth (resistant). Blue = inhibited (susceptible). MIC = lowest concentration maintaining blue colour.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-warn\"\u003e⚠️ Protect resazurin solutions from unnecessary light exposure — photooxidation can cause false background reduction. Prepare fresh working solutions where high assay sensitivity is required.\u003c\/div\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eResazurin vs Other Redox \/ Viability Indicators\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eIndicator\u003c\/th\u003e\n\u003cth\u003eRedox Change\u003c\/th\u003e\n\u003cth\u003eFluorescent?\u003c\/th\u003e\n\u003cth\u003ePrimary Use\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #faf5ff;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eResazurin (ASD-622)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlue → Pink → Colourless\u003c\/td\u003e\n\u003ctd\u003eYes (resorufin, 590 nm)\u003c\/td\u003e\n\u003ctd\u003eAnaerobic media; viability; REMA\/MABA; milk testing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethylene Blue (ASD-601)\u003c\/td\u003e\n\u003ctd\u003eBlue → Colourless (leucoform)\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eRedox indicator; bacterial staining; RNA gels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNeutral Red\u003c\/td\u003e\n\u003ctd\u003eRed → Yellow (pH dependent)\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003epH indicator in media; cell staining\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMTT\u003c\/td\u003e\n\u003ctd\u003eYellow → Purple (formazan)\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eCell viability (requires solubilisation step)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eXTT\u003c\/td\u003e\n\u003ctd\u003eOrange → Red\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eCell viability (soluble product, no wash step)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq\"\u003e\n\u003cdiv class=\"rz2059-faq-item\"\u003e\n\u003cdiv class=\"rz2059-faq-q\"\u003eIs AuSaMicS Resazurin (ASA-2059) equivalent to AlamarBlue?\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-a\"\u003eAlamarBlue (now BioLegend) is a proprietary formulation whose active ingredient is resazurin sodium salt. ASA-2059 is the same compound (CAS 62758-13-8) at ≥98.0% purity. Resazurin sodium salt in aqueous solution at 0.01–0.1% is functionally equivalent to AlamarBlue and is used in the same assay formats at significantly lower cost.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-item\"\u003e\n\u003cdiv class=\"rz2059-faq-q\"\u003eAt what concentration is resazurin used in anaerobic media?\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-a\"\u003eTypically 1 mg\/L (1 ppm) in the final prepared medium — add 1 mL of a 1 mg\/mL aqueous stock per litre. This concentration gives a clear visual blue → pink colour change without significantly affecting organism growth. Some formulations use 0.5–2 mg\/L depending on the medium and application.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-item\"\u003e\n\u003cdiv class=\"rz2059-faq-q\"\u003eWhat is REMA\/MABA and why does it use resazurin?\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-a\"\u003eREMA (Resazurin Microtitre Assay) and MABA (Microplate Alamar Blue Assay) are rapid, low-cost 96-well plate methods for determining the minimum inhibitory concentration (MIC) of antibiotics against \u003cem\u003eMycobacterium tuberculosis\u003c\/em\u003e and other slow-growing pathogens. Resazurin is the viability reporter — metabolically active (resistant) organisms reduce it to pink resorufin, while inhibited (susceptible) wells remain blue. Results are read visually or fluorimetrically within 5–7 days, compared to 3–4 weeks for conventional solid media methods.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-item\"\u003e\n\u003cdiv class=\"rz2059-faq-q\"\u003eCan resazurin be autoclaved?\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-a\"\u003eNo — resazurin stock solutions should NOT be autoclaved. Prepare as an aqueous stock, filter-sterilise (0.22 µm), and add aseptically to cooled sterile media (\u0026lt;50°C). The dry powder is heat-stable; only aqueous solutions are sensitive.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-item\"\u003e\n\u003cdiv class=\"rz2059-faq-q\"\u003eIs CAS 62758-13-8 the correct number for resazurin sodium salt?\u003c\/div\u003e\n\u003cdiv class=\"rz2059-faq-a\"\u003eYes. CAS 62758-13-8 is the sodium salt form (resazurin sodium salt, MW 251.17). The free acid form of resazurin has CAS 550-82-3 (MW 229.19). AuSaMicS ASA-2059 is the sodium salt (water-soluble form), which is the standard laboratory grade.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eCross-Reference \/ Equivalent Products\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eProduct Name\u003c\/th\u003e\n\u003cth\u003eCat. No.\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSigma-Aldrich (Merck)\u003c\/td\u003e\n\u003ctd\u003eResazurin sodium salt\u003c\/td\u003e\n\u003ctd\u003eR7017\u003c\/td\u003e\n\u003ctd\u003eEquivalent grade; CAS 62758-13-8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMerck Millipore\u003c\/td\u003e\n\u003ctd\u003eResazurin sodium salt\u003c\/td\u003e\n\u003ctd\u003e1.01605\u003c\/td\u003e\n\u003ctd\u003eEquivalent grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermo Fisher Scientific\u003c\/td\u003e\n\u003ctd\u003eResazurin, Sodium Salt\u003c\/td\u003e\n\u003ctd\u003eR12204\u003c\/td\u003e\n\u003ctd\u003eEquivalent grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBioLegend (ThermoFisher)\u003c\/td\u003e\n\u003ctd\u003eAlamarBlue® Cell Viability Reagent\u003c\/td\u003e\n\u003ctd\u003eDAL1025\u003c\/td\u003e\n\u003ctd\u003eProprietary formulation; active ingredient = resazurin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 12px; color: #888; font-style: italic; margin-top: 4px;\"\u003eAuSaMicS ASA-2059 is supplied locally in Melbourne at significantly lower cost than proprietary AlamarBlue formulations — same compound, same performance.\u003c\/p\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eRelated Products\u003c\/div\u003e\n\u003cdiv class=\"rz2059-related\"\u003e\n\u003ca href=\"https:\/\/ausamics.com.au\/products\/methylene-blue-powder-pure?variant=48059927822591\" class=\"rz2059-rp\" target=\"_blank\"\u003e\n\u003cdiv class=\"rcat\"\u003eASD-601\u003c\/div\u003e\n\u003cdiv class=\"rname\"\u003eMethylene Blue\u003c\/div\u003e\n\u003cdiv class=\"ruse\"\u003eRedox indicator \u0026amp; bacterial stain\u003c\/div\u003e\n\u003c\/a\u003e\u003ca href=\"https:\/\/ausamics.com.au\/products\/thioglycollate-broth\" class=\"rz2059-rp\" target=\"_blank\"\u003e\n\u003cdiv class=\"rcat\"\u003eAS-1363\u003c\/div\u003e\n\u003cdiv class=\"rname\"\u003eThioglycollate Broth\u003c\/div\u003e\n\u003cdiv class=\"ruse\"\u003eAnaerobic enrichment with resazurin\u003c\/div\u003e\n\u003c\/a\u003e\u003ca href=\"https:\/\/ausamics.com.au\/products\/fluid-thioglycollate-medium\" class=\"rz2059-rp\" target=\"_blank\"\u003e\n\u003cdiv class=\"rcat\"\u003eAS-1233\u003c\/div\u003e\n\u003cdiv class=\"rname\"\u003eFluid Thioglycollate Medium\u003c\/div\u003e\n\u003cdiv class=\"ruse\"\u003eSterility testing — USP\/EP standard\u003c\/div\u003e\n\u003c\/a\u003e\u003ca href=\"https:\/\/ausamics.com.au\/collections\/culture-media\" class=\"rz2059-rp\" target=\"_blank\"\u003e\n\u003cdiv class=\"rcat\"\u003eVIEW ALL\u003c\/div\u003e\n\u003cdiv class=\"rname\"\u003eCulture Media\u003c\/div\u003e\n\u003cdiv class=\"ruse\"\u003eFull catalogue →\u003c\/div\u003e\n\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- end tab 1 --\u003e \u003c!-- TAB 2 --\u003e\n\u003cdiv class=\"rz2059-panel\" id=\"rz2059p2\"\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eChemical \u0026amp; Physical Properties\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eResazurin Sodium Salt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalogue Number\u003c\/td\u003e\n\u003ctd\u003eASA-2059\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIUPAC Name\u003c\/td\u003e\n\u003ctd\u003eSodium 7-hydroxy-3H-phenoxazin-3-one 10-oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSynonyms\u003c\/td\u003e\n\u003ctd\u003eResazurin sodium; Diazoresorcinol sodium; AlamarBlue active component; CI 51010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCAS Number (sodium salt)\u003c\/td\u003e\n\u003ctd\u003e62758-13-8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCAS Number (free acid)\u003c\/td\u003e\n\u003ctd\u003e550-82-3 (not this product)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMolecular Formula\u003c\/td\u003e\n\u003ctd\u003eC₁₂H₆NNaO₄\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMolecular Weight\u003c\/td\u003e\n\u003ctd\u003e251.17 g\/mol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrade\u003c\/td\u003e\n\u003ctd\u003eLaboratory Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePurity\u003c\/td\u003e\n\u003ctd\u003e≥98.0%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAppearance\u003c\/td\u003e\n\u003ctd\u003eDark green to brownish-purple crystalline powder with metallic lustre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolution colour (oxidised)\u003c\/td\u003e\n\u003ctd\u003eBlue (dilute aqueous solution)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduction product\u003c\/td\u003e\n\u003ctd\u003eResorufin (pink\/red, fluorescent; λex ~560 nm \/ λem ~590 nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolubility (water)\u003c\/td\u003e\n\u003ctd\u003eFreely soluble — ~3.5 g\/100 mL at 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolubility (ethanol)\u003c\/td\u003e\n\u003ctd\u003eSlightly soluble\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eλmax (aqueous, oxidised)\u003c\/td\u003e\n\u003ctd\u003e~600 nm (blue\/violet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFluorescence (resorufin)\u003c\/td\u003e\n\u003ctd\u003eλex 560 nm \/ λem 590 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eWorking Concentrations by Application\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eWorking Concentration\u003c\/th\u003e\n\u003cth\u003eDetection\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnaerobic media indicator\u003c\/td\u003e\n\u003ctd\u003e0.5–1 mg\/L (0.5–1 ppm)\u003c\/td\u003e\n\u003ctd\u003eVisual (blue → pink)\u003c\/td\u003e\n\u003ctd\u003eAdd as aqueous stock post-autoclave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMicrobial viability assay\u003c\/td\u003e\n\u003ctd\u003e0.002–0.01% w\/v\u003c\/td\u003e\n\u003ctd\u003eFluorescence or colorimetric\u003c\/td\u003e\n\u003ctd\u003e10% v\/v of 0.02–0.1 mg\/mL working solution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eREMA \/ MABA (TB MIC)\u003c\/td\u003e\n\u003ctd\u003e0.002% w\/v final\u003c\/td\u003e\n\u003ctd\u003eVisual (blue = inhibited)\u003c\/td\u003e\n\u003ctd\u003eAdd 20µL of 0.02% to 96-well plates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMilk reductase test\u003c\/td\u003e\n\u003ctd\u003e~0.005–0.01% w\/v\u003c\/td\u003e\n\u003ctd\u003eVisual (blue → colourless)\u003c\/td\u003e\n\u003ctd\u003eTime to decolourisation indicates microbial load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eStorage \u0026amp; Stability\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e2–8°C; protect from light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContainer\u003c\/td\u003e\n\u003ctd\u003eTightly sealed, amber or light-resistant container\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtect From\u003c\/td\u003e\n\u003ctd\u003eDirect light (photosensitive), heat above 40°C, moisture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShelf Life (powder)\u003c\/td\u003e\n\u003ctd\u003e≥3 years from manufacture date\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAqueous Stock (1 mg\/mL)\u003c\/td\u003e\n\u003ctd\u003eStable 1–3 months at 4°C in dark. Discard if colour changes significantly or precipitate forms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eLiterature \u0026amp; References\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e#\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eO'Brien J, et al. Investigation of the Alamar Blue (resazurin) fluorescent dye for the assessment of mammalian cell cytotoxicity. Eur J Biochem. 2000;267(17):5421–5426. [Mechanism of resazurin reduction in cell viability assays]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003ePalomino JC, et al. Resazurin Microtiter Assay Plate: simple and inexpensive method for detection of drug resistance in Mycobacterium tuberculosis. Antimicrob Agents Chemother. 2002;46(8):2720–2722. [Original REMA method paper]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eCollins L, Franzblau SG. Microplate alamar blue assay versus BACTEC 460 system for high-throughput screening of compounds against Mycobacterium tuberculosis and Mycobacterium avium. Antimicrob Agents Chemother. 1997;41(5):1004–1009. [MABA method development]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eNakayama GR, et al. Assessment of the Alamar Blue assay for cellular growth and viability in vitro. J Immunol Methods. 1997;204(2):205–208. [Resazurin viability assay validation]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eISO 11283:1997. Microbiology of food and animal feeding stuffs — Horizontal method for the enumeration of β-glucuronidase-positive Escherichia coli. [References resazurin in anaerobic media context]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- end tab 2 --\u003e \u003c!-- TAB 3 --\u003e\n\u003cdiv class=\"rz2059-panel\" id=\"rz2059p3\"\u003e\n\u003cdiv class=\"rz2059-info\"\u003e📄 \u003cstrong\u003eFull SDS available:\u003c\/strong\u003e 16-section GHS SDS (Australian WHS Regulations 2023 \/ GHS 7th Edition) — \u003ca style=\"color: #6d28d9;\" href=\"mailto:support@ausamics.com.au\"\u003esupport@ausamics.com.au\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eSection 1 — Identification\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eResazurin Sodium Salt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalogue No.\u003c\/td\u003e\n\u003ctd\u003eASA-2059\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplier\u003c\/td\u003e\n\u003ctd\u003eAuSaMicS Pty Ltd | ABN 56 676 640 467\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAddress\u003c\/td\u003e\n\u003ctd\u003e31 Longview CT, Thomastown VIC 3074, Australia\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmergency\u003c\/td\u003e\n\u003ctd\u003ePoisons Information Centre: \u003cstrong\u003e13 11 26\u003c\/strong\u003e (24 hr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhone\u003c\/td\u003e\n\u003ctd\u003e+61 412 520 598\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmail\u003c\/td\u003e\n\u003ctd\u003esupport@ausamics.com.au\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eSection 2 — Hazard Identification (GHS 7th Ed \/ WHS 2023)\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGHS Classification\u003c\/td\u003e\n\u003ctd\u003eEye Irrit. 2 — H319: Causes serious eye irritation\u003cbr\u003eAquatic Chronic 3 — H412: Harmful to aquatic life with long-lasting effects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Word\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eWARNING\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGHS Pictograms\u003c\/td\u003e\n\u003ctd\u003e⚠️ Exclamation mark  |  🌿 Environmental hazard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNote\u003c\/td\u003e\n\u003ctd\u003eRelatively low hazard profile at laboratory use concentrations. Primary concern is eye irritation and aquatic toxicity.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eSections 4–8 — First Aid, Fire \u0026amp; PPE\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInhalation\u003c\/td\u003e\n\u003ctd\u003eRemove to fresh air. Seek medical attention if symptoms persist.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSkin Contact\u003c\/td\u003e\n\u003ctd\u003eWash with soap and water. Note: may stain skin pink\/purple — not a hazard, fades within hours.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Contact\u003c\/td\u003e\n\u003ctd\u003eIrrigate immediately with water ≥15 min, hold eyelids apart. Seek medical attention if irritation persists.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIngestion\u003c\/td\u003e\n\u003ctd\u003eRinse mouth. Not expected to be acutely toxic at laboratory quantities. Call Poisons Centre \u003cstrong\u003e13 11 26\u003c\/strong\u003e if large amounts ingested.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtinguishing Media\u003c\/td\u003e\n\u003ctd\u003eWater spray, foam, dry powder, CO₂\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRespiratory Protection\u003c\/td\u003e\n\u003ctd\u003eP1 filter when weighing bulk powder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Protection\u003c\/td\u003e\n\u003ctd\u003eSafety glasses — eye staining risk from solutions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSkin Protection\u003c\/td\u003e\n\u003ctd\u003eNitrile gloves, lab coat. Resazurin stains skin and clothing — use disposable gloves.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eSections 12–15 — Ecology, Disposal \u0026amp; Regulatory\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAquatic Toxicity\u003c\/td\u003e\n\u003ctd\u003eHarmful to aquatic life with long-lasting effects (H412). Avoid bulk discharge to waterways.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisposal\u003c\/td\u003e\n\u003ctd\u003eDispose of solutions as chemical waste per local EPA regulations. Small volumes may be diluted and disposed via trade waste drain per institutional policy.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransport\u003c\/td\u003e\n\u003ctd\u003eNot classified as dangerous goods — ADG, IMDG, IATA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRegulatory Framework\u003c\/td\u003e\n\u003ctd\u003eAustralian WHS Regulations 2023 | GHS 7th Edition | Safe Work Australia COP 2021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAICIS Status\u003c\/td\u003e\n\u003ctd\u003eListed on Australian Inventory of Industrial Chemicals (AIIC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoisons Schedule\u003c\/td\u003e\n\u003ctd\u003eNot scheduled under SUSMP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- end tab 3 --\u003e \u003c!-- TAB 4 --\u003e\n\u003cdiv class=\"rz2059-panel\" id=\"rz2059p4\"\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eQuality Specifications\u003c\/div\u003e\n\u003ctable class=\"rz2059-tbl\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAppearance\u003c\/td\u003e\n\u003ctd\u003eDark green to brownish-purple crystalline powder with metallic lustre\u003c\/td\u003e\n\u003ctd\u003eVisual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePurity\u003c\/td\u003e\n\u003ctd\u003e≥98.0%\u003c\/td\u003e\n\u003ctd\u003eHPLC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eλmax (aqueous, oxidised)\u003c\/td\u003e\n\u003ctd\u003e600 ± 5 nm\u003c\/td\u003e\n\u003ctd\u003eUV-Vis spectrophotometry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Solubility\u003c\/td\u003e\n\u003ctd\u003eComplete dissolution in water at 3.5 g\/100 mL; blue solution\u003c\/td\u003e\n\u003ctd\u003eVisual inspection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedox Response\u003c\/td\u003e\n\u003ctd\u003eColour change blue → pink on addition of ascorbic acid (reducing agent) — confirms active redox indicator function\u003c\/td\u003e\n\u003ctd\u003eFunctional redox test\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoss on Drying\u003c\/td\u003e\n\u003ctd\u003e≤2.0%\u003c\/td\u003e\n\u003ctd\u003eLoss on drying (60°C \/ 2h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeavy Metals\u003c\/td\u003e\n\u003ctd\u003e≤20 ppm\u003c\/td\u003e\n\u003ctd\u003eICP-OES\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBatch COA\u003c\/td\u003e\n\u003ctd\u003eAvailable for every production lot\u003c\/td\u003e\n\u003ctd\u003eOn request or included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"rz2059-sh\"\u003eManufacturing \u0026amp; Documentation\u003c\/div\u003e\n\u003cdiv class=\"rz2059-info\"\u003e\n\u003cstrong\u003eSupplied by AuSaMicS Pty Ltd\u003c\/strong\u003e\u003cbr\u003e31 Longview CT, Thomastown VIC 3074, Australia | ABN 56 676 640 467\u003cbr\u003e\u003cbr\u003e✓ HPLC purity verification and functional redox test per batch\u003cbr\u003e✓ COA, TDS, SDS included with every order\u003cbr\u003e✓ Australian stock — no import delays\u003cbr\u003e✓ Cost-effective alternative to proprietary AlamarBlue formulations\u003cbr\u003e✓ Available in 1 g, 5 g, 10 g, 25 g, 100 g pack sizes\u003c\/div\u003e\n\u003cdiv class=\"rz2059-warn\"\u003e⚠️ \u003cstrong\u003eIntended Use:\u003c\/strong\u003e For laboratory and research use only. Not for therapeutic, diagnostic, food, veterinary, or consumer use. Photosensitive — store and use protected from unnecessary light exposure.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- end tab 4 --\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rz2059-footer\"\u003e\n\u003cstrong\u003eAuSaMicS Pty Ltd\u003c\/strong\u003e | 31 Longview CT, Thomastown VIC 3074, Australia | ABN 56 676 640 467\u003cbr\u003esupport@ausamics.com.au | +61 412 520 598 | www.ausamics.com.au\u003cbr\u003e\u003cspan style=\"color: #999;\"\u003eThe information provided is accurate to the best of our knowledge at the time of publication. AuSaMicS Pty Ltd accepts no liability for any loss, damage, or injury arising from use outside the intended application.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"AuSaMicS","offers":[{"title":"1 g","offer_id":48499506086143,"sku":"ASD-622-1G","price":49.0,"currency_code":"AUD","in_stock":true},{"title":"5 g","offer_id":48499506118911,"sku":"ASD-623-5G","price":129.0,"currency_code":"AUD","in_stock":true},{"title":"25 g","offer_id":48499506151679,"sku":"ASD-624-25G","price":479.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/1087\/0271\/files\/Resazurin.jpg?v=1778417753","url":"https:\/\/ausamics.com.au\/products\/resazurin-sodium-salt-l-asa-2059","provider":"AuSaMicS","version":"1.0","type":"link"}