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Phosphorous acid (13598-36-2)

Identification
Name:Phosphorous acid
Synonyms:Orthophosphorous acid; Phosphorousacidcrystalline; Phosphonic acid
CAS:13598-36-2
EINECS: 237-066-7
Molecular Formula: H3PO3
Molecular Weight: 82
InChI: InChI=1/H3O3P/c1-4(2)3/h4H,(H2,1,2,3)
Molecular Structure: (H3PO3) Orthophosphorous acid; Phosphorousacidcrystalline; Phosphonic acid
Properties
Transport:UN 2834
Density:1.651
Stability:Stable. Incompatible with strong bases. Hygroscopic.
Water Solubility:SOLUBLE
Solubility:310 g/100 mL in water; soluble in alcohol
Appearance:white crystalline solid
Specification:

?Phosphorous acid?(CAS NO.13598-36-2) can be formulated as HP(O)(OH)2 and therefore contains phosphorus in oxidation state +3. HP(O)2(OH)- is a moderately strong acid.The HP(O)2(OH)- species is called the hydrogenphosphite ion, and the HPO32- the phosphite ion. Both it and its deprotonated forms are good reducing agents, although not necessarily quick to react. They are oxidized to?it or its salts. It reduces solutions of noble metal cations to the metals.

Packinggroup: III
Sensitive: Air Sensitive & Hygroscopic
Safety Data
Hazard Symbols C:Corrosive