CAS Registry Number

CAS 6104-59-2 — Coomassie brilliant blue R-250 (C.I. 42660)

Coomassie brilliant blue R-250 (C.I. 42660) is a blue dye commonly used for protein staining in SDS-PAGE and other electrophoretic techniques. It binds to proteins via hydrophobic and ionic interactions, enabling visualization of protein bands. Available in powder form with a molecular weight of 825.97 g/mol, its CAS number is 6104-59-2, and its molecular formula is C45H44N3NaO7S2. Stable at ambient temperature with no signal word. Molekula supplies Coomassie brilliant blue R-250 from research to bulk quantities with full documentation and ISO 9001:2015 traceability.