Our company is a professional chemical company, 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 bitter salt, aluminum sulfate, sodium benzoate and sodium pyrosulfite, we can provide food grade, specification is: 96% or 98% . Packing with 25kg woven bag. 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.