CAS Registry Number

CAS 1936-15-8 — Orange G (C.I.16230)

Orange G (C.I. 16230) is a synthetic azo dye widely used in histopathology as a counterstain, particularly in Masson’s trichrome staining to differentiate collagen fibers. It also serves in textile dyeing, food coloring, and biological research applications. This chemical has a CAS number of 1936-15-8, with a molecular formula of C16H10N2Na2O7S2 and a molecular weight of 452.37. It is stable at ambient storage conditions and carries no signal word for hazard classification. Molekula supplies Orange G from research to bulk quantities with full documentation and ISO 9001:2015 traceability.