We are looking for suppliers of following products; * Monocalcium Phosphate (CAS: 7758-23-8, Ca2H3O4P) * Patent Alum (CAS: 10043-01-3, Al2 (SO4) 3 18 H2O) * Iron Sulfate (CAS: 7720-78-7, FeSO4 7H20) * Anhydrite (Anhydrous gypsum, CAS: 7778-18-9, CaSO4) We don't need food grade. We need cheap industrial grade. Pls send yr best quotation in 500kg jumbo bag