Formula: C₁₆H₁₀N₂Na₂O₈S₂ CAS: 548-80-1 EC No.: 208-969-3 M (Molar Mass): 468.37 g/mol D (Density): Not applicable mp (Melting Point): >300°C bp (Boiling Point): Not applicable

Dye content: ≥ 85% Appearance: Dark red to brown powder. Identification (IR): Passes test. Loss on Drying: ≤ 5.0 % Residue on Ignition: ≤ 0.5 % Heavy Metals (as Pb): ≤ 50 ppm Solubility: Soluble in water pH (1% solution): 6.5-8.5 Color strength: 95-105% of standard