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Acid Red 92 (Phloxine B) cosmetic and laboratory dye powder Ausamics ASD-631
  • Acid Red 92 (Phloxine B) cosmetic and laboratory dye powder Ausamics ASD-631
  • Acid Red 92 (Phloxine B) cosmetic and laboratory dye powder Ausamics ASD-631
Acid Red 92 (Phloxine B)

Acid Red 92 (Phloxine B)

$67.00
Weight

Acid Red 92 (Phloxine B) — High Purity

Water-Soluble Xanthene Dye for Cosmetic & Laboratory Applications

Catalog Number: ASD-631
CAS Number: 18472-87-2
Colour Index: C.I. 45410
Grade: Cosmetic Grade / D&C Red No. 28 / Analytical Reagent Grade

Product Overview

Acid Red 92, commonly known as Phloxine B or D&C Red No. 28, is a high-purity, water-soluble xanthene dye widely used in cosmetic formulations and laboratory staining applications.

This Ausamics batch (ASD-631) demonstrates an exceptional assay purity of 90.70%, significantly exceeding standard market specifications (typically ≥85%). The result is stronger colour intensity, reduced dosage requirements, and improved formulation efficiency.

Phloxine B is valued for its vivid magenta to bluish-red fluorescence and its excellent stability in alkaline environments, making it particularly suitable for bath bombs, soaps, and high-pH cosmetic products. In laboratory settings, it is used as a histological and microbiological staining dye, including cytoplasmic counterstaining and diagnostic applications.

Key Features & Benefits

  • Ultra-high purity: Assay 90.70% (specification >85%)

  • Low impurity profile: Very low volatile matter and inorganic salts

  • Excellent solubility: Minimal insoluble matter for clear solutions

  • Alkaline stability: Performs exceptionally well in high-pH formulations

  • Heavy-metal compliant: Tested for Pb, Hg, and As

Typical Applications

💄 Cosmetics & Personal Care (D&C Red No. 28)

  • Bath bombs: Industry-standard dye for vibrant pink shades with excellent water dispersion

  • Cold-process soaps: Stable in high-pH soap formulations

  • Skin & hair products: Used in lotions, shampoos, and conditioners

🔬 Laboratory & Diagnostic Use

  • Histology: Cytoplasmic counterstain (Phloxine-Eosin staining)

  • Microbiology: Used in selective and differential media

  • Dental: Plaque-disclosing agents

Certificate of Analysis (CoA)

Batch Analysis Report No.: 050725

No. Test Parameter Specification Result Status
1 Purity (Assay) ≥ 85.0 % 90.70 % ✅ Pass
2 Volatile Matter + Chlorides/Sulfates (as Na salt) ≤ 15.0 % 3.70 % ✅ Pass
3 Water Insoluble Matter (alkaline) ≤ 0.5 % 0.15 % ✅ Pass
4 Lead (Pb) ≤ 20 ppm < 20 ppm ✅ Pass
5 Mercury (Hg) ≤ 1 ppm < 1 ppm ✅ Pass
6 Arsenic (As) ≤ 3 ppm < 3 ppm ✅ Pass

Regulatory Information

  • USA: Certified as D&C Red No. 28 (21 CFR 74.1328)

    • Permitted for drugs and cosmetics

    • Not permitted for food use

  • EU: Permitted in cosmetics as CI 45410

  • Safety: Do not ingest; suitable for external and laboratory use only

Storage & Handling

  • Store in a tightly sealed container

  • Keep in a cool, dry place, protected from moisture

  • Protect from direct sunlight to maintain colour stability

Intended Use

For cosmetic manufacturing, laboratory, and research use only.
Not for food use or internal consumption.

Quality & Documentation

  • Batch-specific Certificate of Analysis (CoA) supplied

  • SDS available upon request

  • Manufactured and handled under controlled quality conditions

Customs & Trade Information

HS / AHECC Code: 3204.19.00
Synthetic organic colouring matter and preparations

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