Formula: KCr(SO₄)₂·12H₂O CAS: 7788-99-0 EC No.: 233-401-6 M (Molar Mass): 499.40 g/mol D (Density): 1.83 g/cm³ mp (Melting Point): 89°C bp (Boiling Point): 400°C (decomposes)

Assay (Titration): ≥ 99.0 % Appearance: Dark violet crystals. Identification (IR): Passes test. Insoluble in water: ≤ 0.01 % Chloride (Cl): ≤ 0.003 % Heavy Metals (as Pb): ≤ 10 ppm Iron (Fe): ≤ 0.003 % Ammonium (NH₄): ≤ 0.003 % Loss on Drying: 42.5-43.5 % pH (5% solution): 3.0-4.0 Water insoluble matter: ≤ 0.01 %