Formula: Al₂(SO₄)₃·18H₂O CAS: 7784-31-8 EC No.: 233-135-0 M (Molar Mass): 666.43 g/mol Appearance: White crystals or powder

Assay (Complexometric): ≥ 98.0%. Appearance: White crystals or powder. Water of Crystallization: 47.0-50.0%. Aluminum Content (as Al): 7.8-8.2%. pH (5% solution): 2.5-3.5. Chloride (Cl): ≤ 0.005%. Heavy Metals (as Pb): ≤ 10 ppm. Iron (Fe): ≤ 0.005%. Alkalies and Alkaline Earths: ≤ 0.2%. Water Insoluble Matter: ≤ 0.05%. Arsenic (As): ≤ 3 ppm. Solubility: Very soluble in water.