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Sodium Selenite (Na₂SeO₃) | CAS 10102-18-8 | Laboratory Grade
$37.00 AUD
AuSaMicS Life Science™ · Laboratory Reagents · Inorganic Chemistry
Sodium Selenite
Laboratory Grade | Na₂SeO₃ | Cat: AS-8015 | CAS 10102-18-8
Defined inorganic selenium compound of consistent purity, supplied for analytical research, redox chemistry, and industrial formulation. Assay 98.5–101.5%, selenium content ≥45.0%. Australian stock held in Melbourne — full COA and SDS provided with every order.
AS-8015 ✓ In Stock Australia ⚡ Same-Day Dispatch ☠ DANGER — Toxic (GHS06/GHS09)
Quick Specs
CatalogueAS-8015
CAS Number10102-18-8
FormulaNa₂SeO₃
Molecular Weight172.94 g/mol
Assay98.5–101.5%
Se Content≥ 45.0%
Shelf Life36 months
Overview
Sodium Selenite (AS-8015) is a white to almost white, deliquescent crystalline inorganic salt (Na₂SeO₃) supplied as a defined, traceable selenium reference compound. It is manufactured to consistent purity and composition, with each batch supported by a Certificate of Analysis.
Distributed by AuSaMicS Pty Ltd from our Epping facility, sourced from an established manufacturing partner with full batch traceability. For laboratory, analytical, and industrial research use only — not for food, dietary supplement, therapeutic, diagnostic, or veterinary use.
Applications
Analytical & Reference Chemistry
Reference compound for selenium analysis by AAS, ICP-MS, and spectrophotometric methods.
Redox Chemistry Research
Selenite reduction studies and selenium/selenide precursor chemistry.
Materials Synthesis
Precursor for selenide nanomaterials, including zinc selenide (ZnSe) and metal selenides.
Industrial Formulation
Component in controlled industrial and process formulation development.
Academic & Research
General inorganic and materials chemistry teaching and research applications.
Highly toxic — handle with care. Sodium selenite is classified Acute Toxicity Category 2 (oral and inhalation) — fatal if swallowed or inhaled. Always review the full Safety Data Sheet before handling. See the Safety & Handling tab.
Search & Discovery
Laboratories commonly find this product by searching:
- sodium selenite Australia
- Na2SeO3 laboratory grade
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- AS-8015 AuSaMicS
Typical Specifications
| Parameter | Specification | Typical Result* |
|---|---|---|
| Assay (dry basis) | 98.5% – 101.5% | 99.40% |
| Selenium (Se, dry basis) | ≥ 45.0% | 45.50% |
| Appearance | White to almost white, crystalline, deliquescent | Complies |
| pH (5% solution) | 9.8 – 10.8 | 10.31 |
| Loss on drying (130°C) | ≤ 0.5% | 0.34% |
| Chlorides | ≤ 50 ppm | < 50 ppm |
| Sulfates & selenates | ≤ 50 ppm | Nil |
| Iron | ≤ 50 ppm | < 50 ppm |
| Lead (Pb) | ≤ 20 ppm | Batch-specific — see COA |
| Arsenic (As) | ≤ 10 ppm | Batch-specific — see COA |
| Cadmium (Cd) | ≤ 5 ppm | Batch-specific — see COA |
| Mercury (Hg) | ≤ 0.1 ppm | Batch-specific — see COA |
*Typical results reflect the most recent supplier Certificate of Analysis on file. Each batch is supplied with its own COA — request the batch-specific document at time of order.
Identifiers
| CAS Number | 10102-18-8 |
| EC Number | 233-267-9 |
| MDL Number | MFCD00003489 |
| PubChem CID | 24934 |
| Molecular Formula | Na₂SeO₃ |
| Molecular Weight | 172.94 g/mol |
☠ Danger
GHS06 (Acute Toxicity) and GHS09 (Environmental Hazard). Full hazard and precautionary statements are provided in the Safety Data Sheet — request via the Documentation tab.
GHS Classification
| Hazard Class | Category | Statement |
|---|---|---|
| Acute toxicity, oral | 2 | H300 — Fatal if swallowed |
| Acute toxicity, inhalation | 2 | H330 — Fatal if inhaled |
| Skin irritation | 2 | H315 — Causes skin irritation |
| Eye irritation | 2 | H319 — Causes serious eye irritation |
| Skin sensitisation | 1 | H317 — May cause an allergic skin reaction |
| Chronic aquatic hazard | 2 | H411 — Toxic to aquatic life with long-lasting effects |
Handling & Storage
| Handling | Work under fume hood or local exhaust ventilation. Avoid generating or inhaling dust. Do not eat, drink, or smoke when handling. |
| PPE | Chemical safety goggles, chemically resistant gloves (e.g. nitrile), and laboratory coat as a minimum. |
| Storage | Store at ~20°C, tightly closed, protected from moisture and light. Store locked up, away from incompatible materials. |
| Incompatibilities | Strong acids (liberate toxic selenium oxide/hydride gases), strong oxidising and reducing agents. |
| Emergency (Australia) | Poisons Information Centre: 13 11 26 (24 hours) |
Physical & Chemical Properties
| Physical State | Solid, crystalline |
| Colour | White to almost white |
| Odour | Odourless |
| Melting Point | > 350°C (decomposes above ~300°C) |
| Density | 3.1 g/cm³ |
| Water Solubility | ~90 g/100 mL at 20°C — freely soluble |
| Solubility — Other | Practically insoluble in ethanol and ether |
| Autoignition Temperature | > 400°C |
| Flammability | Not flammable |
| Oral LD₅₀ (rat) | ≈ 7 mg/kg — highly toxic |
Chemical Role
Sodium selenite is an oxyanion salt of selenium(IV), functioning as a soluble, bioavailable source of selenium in aqueous systems. The selenite ion (SeO₃²⁻) is readily reduced by thiols (e.g. glutathione, cysteine) to elemental selenium or hydrogen selenide — a property exploited in redox chemistry, selenide nanomaterial synthesis, and selenium research generally.
Available Pack Sizes
| Pack Size | Recommended For |
|---|---|
| 25 g | Method development, small-scale reference use |
| 100 g | Routine laboratory and analytical use |
| 500 g | Ongoing research programmes |
| 1 kg / Custom | Industrial formulation and bulk supply — contact us for a quote |
Custom quantities & institutional supply: For quantities above 1 kg or institutional/government purchase orders, request a quote. Due to the toxicity classification of this product, shipping is subject to dangerous goods (Class 6.1) handling requirements.
Order Information
| Catalogue Number | AS-8015 |
| Dispatch | Same-day for orders placed before 12:00 PM AEST (Melbourne, weekdays) |
| Shipping | Australia-wide via dangerous goods–compliant courier (UN 2630, Class 6.1, PG I) |
| Payment | Credit card, EFT, purchase order (approved institutional accounts) |
| COA | Provided with every shipment |
Available Documents
| Certificate of Analysis (COA) | Batch-specific: assay, Se content, pH, loss on drying, impurity limits, lot number, expiry. Request COA → |
| Safety Data Sheet (SDS) | Full 16-section GHS/WHS-compliant SDS (Australian format). Download SDS → |
| Technical Data Sheet (TDS) | Specifications, physical/chemical properties, applications, and literature references. |
Pre-purchase documentation: All documents available before order placement. Email support@ausamics.com with catalogue number AS-8015. Response within one business day.
Intended Use
| Intended Use | Laboratory, analytical and industrial research use only — not for food, feed, dietary supplement, clinical diagnostic, cosmetic, or therapeutic use. |
| GHS Classification (AU) | WHS Regulations; GHS as adopted in Australia |