Erythrosine B

Erythrosine B (CAS 16423-68-0) is a synthetic iodine-containing xanthene dye registered under EC 240-474-8. It is commercially referenced as D&C Red 3, C.I. 773, and under colour index designations 1427 Red and 1671 Red. No E-code applies to its industrial supply outside food-grade contexts.

In pharmaceutical tablet coating and printing inks, Erythrosine B functions as a colorant by absorbing green light and transmitting red wavelengths, producing a characteristic cherry-red hue. Its iodine-rich molecular structure also confers antimicrobial activity against biofilm-forming organisms, making it relevant in textile and paper processing where microbial contamination must be controlled.

This material is supplied as a fine powder and is subject to REACH registration requirements for European trade. Procurement teams should confirm grade specification against Ph.Eur. or FCC monographs depending on end-use sector. HS code 32129000 applies for import and customs classification purposes.