Erythrosine

CAS Number
16423-68-0
EC Number
240-474-8
Chemical Formula
C20H8I4O5.2Na
Molecular Weight
835.9 g/mol
E Number
E127

Description

Erythrosine (CAS 16423-68-0), also known as E127 and erythrosine sodium anhydrous, is a synthetic red dye derived from fluorone. It delivers a bright cherry-pink to red coloration across food, pharmaceutical, and industrial applications. It is one of the few certified red colorants approved for specific food uses in multiple regulatory markets. This makes it a reliable option for formulators working within defined compliance frameworks and strict safety guidelines.

In food manufacturing, it is used to color maraschino cherries, candied fruits, and certain confectionery products where a vivid red shade is required. Pharmaceutical tablet coatings and oral dosage forms use it for product identification. In printing inks and packaging, it contributes to red and pink tones in water-based ink formulations. The textile and paper industries apply it as a dye for specialty coloring processes where its fluorescent properties support visual effects.

The product is supplied as a fine red powder or water-soluble granules. It is available in food-grade specifications certified to FCC and E127 standards, ensuring high purity for human consumption and safety. Pharmaceutical-grade material is also available meeting USP and BP requirements. Technical-grade material is offered for industrial dyeing and printing applications where specific regulatory certifications are not required.

Other Names (Synonyms)

erythrosine sodium anhydrous|Disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl)benzoate|E127|3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one|FD & C red no. 3|RefChem:591122|Fluorescein, 2′,4′,5′,7′-tetraiodo-, disodium salt|Erythrosine B

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point 693.2 °C
Density 0.98
Flash Point 285°C
Appearance red to brown powder
Color Deep red to brown
Form Fine Powder
Water Solubility Soluble in water
Vapor Pressure 0Pa at 25℃
pH 6-7 (10g/l, H2O, 20℃)
Log P -1.163 at 25℃

Trade & Regulatory

HS Code 32129000
UN Number 3077
WGK (Germany) 3

Documentation

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