Description

Erythrosin B is a synthetic, water-soluble xanthene dye widely recognized for its vibrant pink to red color. Its primary value lies in its strong tinctorial strength and stability, making it a reliable colorant for demanding applications. This product is essential for manufacturers in the food, pharmaceutical, and cosmetic industries seeking consistent and compliant coloring agents. We supply high-purity Erythrosin B CAS NO 16423-68-0 to meet the stringent quality requirements of global B2B customers.

Application

• Food Coloring (FD&C Red No. 3): Used to color candies, cake decorations, popsicles, and various processed foods.
• Pharmaceuticals: Employed as a colorant in tablets, capsules, and syrups for product identification and branding.
• Cosmetics & Personal Care: Imparts color to lipsticks, blushes, soaps, and bath products.
• Biological Staining: Acts as a counterstain in microscopy and histology, particularly in Gram staining protocols.
• Diagnostic Reagents: Used as a tracer or indicator in certain clinical and laboratory test kits.
• Industrial Applications: Suitable for coloring paper, inks, and textiles where a stable red hue is required.

Basic Information

Product Name	Erythrosin B
CAS No.	16423-68-0
Molecular Formula	C20H6I4Na2O5
Molecular Weight	879.86 g/mol
Synonyms	Acid Red 51; FD&C Red No. 3; Food Red 14; CI 45430; Erythrosine; Erythrosine B; Erythrosine Sodium; Tetraiodofluorescein Sodium Salt
EINECS	240-474-8

Quality Control

Our Erythrosin B is manufactured and tested to meet high-purity standards suitable for food, pharmaceutical, and cosmetic applications. Quality assurance protocols include identity confirmation, purity assay, and control of specific impurities. We can provide material compliant with relevant specifications such as FCC (Food Chemicals Codex) and other international pharmacopoeia standards upon request. A detailed Certificate of Analysis (COA) is provided with each batch to ensure full traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials and sources of heat.

Specification

Item	Specification
Appearance	Red to brownish-red powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 85.0%
Loss on Drying	≤ 15.0 %
Water-insoluble matter	≤ 0.2 %
Iodide (as I)	≤ 0.1 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.