tangshan sunfar silicon industries co.,ltd, is one of the biggest manufacture factory produce caustic soda and calcium carbide in north, have perfect production capacity. Our company is also doing business on other chemical product, such as aluminum sulfate , sodium benzoate , sodium pyrosulfite and soda ash light, offer the specification of soda ash light:Content 99.2% or 98.5%,nacl 0.5% max iron 0.004% max water insoluble 0.04% max sulphate 0.03% maxignition 0.8% maxbulk density 0.85g/ml min Packing with 50 kg woven plastic bags. Many years of exit experience lets our company have supply material in time, product quality is high, optimum characteristic of price, welcome everyone to contact us.