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 PHOSPHOROUS ACID 

Product Name: Phosphorous acid
Synonyms: Phosphonic acid; hydrogen phosphonate; phosphorus(+3) trihydride cation trihydroxide; Orthophosphorus; Orthophosphorous acid; Ortho-Phosphorous acid
CAS RN.: 10294-56-1;13598-36-2
EINECS: 237-066-7
Molecular Weight: 81.9957
Molecular Formula: H3PO3
Melting Point(℃): 73℃
Water Solubility: SOLUBLE
Phosphorous acid