CAS Registry Number

CAS 6104-58-1 — Coomassie brilliant blue G-250 (C.I. 42655)

Coomassie Brilliant Blue G-250 is a triarylmethane dye widely used as a protein stain in SDS-PAGE and other electrophoretic techniques, as well as a reagent in Bradford protein assays for quantifying protein concentration. It binds reversibly to proteins, shifting its absorption spectrum for easy detection. This high-purity dye has a CAS number of 6104-58-1, a molecular formula of C47H48N3NaO7S2, and a molecular weight of 854.02 g/mol. It is stable at ambient storage conditions and carries no signal word for hazard classification. Molekula supplies Coomassie Brilliant Blue G-250 from research to bulk quantities with full documentation and ISO 9001:2015 traceability.