Jiangyin Victory Chemical Co., Ltd produce and sell Phosphorous acid 99% from PCL3, 98.5% of by product in bluk at cheap price Physiochemical propertiesColorless crystal. Relative density. Melting point: boiling point ( decomposed). Easily soluble in water and alcohol. Use:Mainly in phosphite, synthetic fiber and organophosphorus pesticide etc., Also in water treating agent .