10294-56-1

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10294-56-1 Structure

Identification	Back Directory
[Name] Phosphorous acid
[CAS] 10294-56-1
[Synonyms] Phosphorou acid Phosphorous acid Orthophosphorus acid Phosphorous acid 50% aqueous solution Orthophosphorus acid ISO 9001：2015 REACH
[EINECS(EC#)] 233-663-1
[Molecular Formula] H3PO3
[MOL File] 10294-56-1.mol
[Molecular Weight] 82

Chemical Properties	Back Directory
[pka] 2.22±0.10(Predicted)
[CAS DataBase Reference] 10294-56-1
[NIST Chemistry Reference] H3PO3(10294-56-1)
[EPA Substance Registry System] Phosphorous acid(10294-56-1)

Safety Data	Back Directory
[Symbol(GHS) ] GHS07,GHS05
[Signal word ] Danger
[Hazard statements ] H302-H314
[Precautionary statements ] P264-P270-P301+P312-P330-P501-P260-P264-P280-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P321-P305+P351+P338-P405-P501
[Hazard Codes ] Xn,C
[Risk Statements ] 22-35
[Safety Statements ] 1/2-26-36/37/39-45
[RIDADR ] UN 2834

Hazard Information	Back Directory
[Uses] Phosphorous acid is a reducer in chemical reactions and a raw material in the making of phosphorous acid salts. A plant defoliant.
[Definition] A white crystalline solid. It is a monobasic acid forming the anion H₂PO₂^- in water. The sodium salt, and hence the acid, can be prepared by heating yellow phosphorus with sodium hydroxide solution. The free acid and its salts are powerful reducing agents.

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