Formula: C₄₀H₃₂Cl₂N₈O₂ (3,3'-(3,3'-Dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(2,5-diphenyl-2H-tetrazolium) dichloride) CAS: 1871-22-3 EC No.: 217-510-7 M (Molar Mass): 727.66 g/mol D (Density): Not applicable (powder) mp (Melting Point): Decomposes bp (Boiling Point): Not applicable Optical Rotation: Not applicable

Assay (Spectrophotometric): ≥ 95.0 % Appearance: Yellow to tan powder. Identification (Reduction Test): Reduced by reducing agents to an intense blue formazan. Solubility: Soluble in water and alcohol. Suitability for Dehydrogenase Histochemistry: Passes test (produces blue precipitate at sites of enzyme activity). Loss on Drying (at 110°C): ≤ 1.0 %