| Benzopurpurine 4B is a biological stain and pH indicator for pH 1.3 to 4.2. Synonyms: C.I. Direct Red 2, C.I. Direct Red 2, Disodium Salt, Amanil Purpurine 4B, Atul Direct Red 4B, Azamin 4B, Azocard Red 4B, Bencidal Purple 4B, Benzanil Purpurine 4B, Benzopurpurin 4B, Benzopurpurin B, Benzopurpurine 4BKX, Benzopurpurine 4BX, Brasilamina Red 4B, C.I. 23500, Calcomine Red 4BX, Chrome Leather Red 4B, Cotton Red 4B, Diacotton Benzopurpurine 4B, Diamine Purpurine 4B, Diaphtamine, Diazamine Purpurine 4B, Diazine Red 4B, Diazol Purpurine 4B, Diphenyl Red 4B, Diphenyl Red 4BS, Direct Purpurine 4B, Direct Purpurine M 4B, Direct Red 2, Direct Red 4A, Direct Red 4B, Direct Red DCB, Direct Scarlet 4BE, Eclipse Red, Erie Benzo 4BP, Erie Red 4B, Fast Scarlet, Hispamin Red 4B, Kayaku Benzopurpurine 4B, Mitsui Benzopurpurine 4BX, Paper Red 4BS, Phenamine Purpurine 4B, Purpurin 4B, Purpurine CAS Number: 992-59-6 Molecular Formula: C34H28N6O6S22Na Molecular Weight: 726.73 CAS Number: 992-59-6 Appearance: Light brown to red-brown powder Transition Interval: Violet (pH 1.3) to red (pH 4.2) lambdamax in Water: 500nm Solubility: Clear, dark red solution (C = 1mg/mL in water) Storage: RT |
