Dears, Nice day! We are a manufacturer specializing in producing chemicals in China. Our product include Aluminium sulphate17% min, Caustic soda, Soda Ash, Formic Acid 85%90% min, Sodium Metabisulfite 64% min, Zinc oxide, Carbon black, Iron oxide red/yellow/black/green and other related chemical products. You also can look at more products from our website. We are looking forward to establish win-win business relations with you. Many Thanks & Best Regards