Formula: CaSO₄·2H₂O CAS: 10101-41-4 EC No.: 231-900-3 M (Molar Mass): 172.17 g/mol D (Density): 2.32 g/cm³ mp (Melting Point): 128°C (loses water) bp (Boiling Point): 163°C (decomposes)

Assay (Titration): ≥ 99.0 % Appearance: White fine powder. Identification (IR): Passes test. Chloride (Cl): ≤ 0.02 % Heavy Metals (as Pb): ≤ 10 ppm Iron (Fe): ≤ 0.01 % Carbonate (CO₃): ≤ 0.2 % Loss on Ignition: 19.5-20.5 % Acid insoluble matter: ≤ 0.1 % pH (5% slurry): 6.0-7.5 Water soluble matter: ≤ 0.2 %