Phosphorous acid,Phosphorous Acid 98.5%min,we are regular exporter,we have REACH no. ... 3) CAS no.: 10294-56-1 4) Molecular formula: H3PO3 5) Molecular weight: 826) Specific gravity: 1.65107) Melting point ... point: 200°C (decomposing at 180°C) Specifications:content:98.5%minphosphate:0.2%maxchloride:0.02%maxsulphate:0.002%maxheavy ... Hope to cooperate with you. Phosphorous Acid,Phosphorous Acid 98.5%min