As a specialized Trading company on the chemical products with many years experience, The following is our strong products: 1. Aluminium Sulphate; Al2 O3 content min. 17% ;2. Ferrous Sulphate; Fe content min. 20% ; 3. Ammonium Alum Sulphate; Al2 O3 content min. 10% ; We are now dealing with GUM COPAL PWS / WS