Phosphorous acid

August 29th, 2008 by

Phosphorous acid

IUPAC name
phosphonic acid
hydridodihydroxidooxidophosphorus
Other names
phosphonic acid
Identifiers
CAS number
RTECS number
SZ6400000
Properties
Molecular formula
H3PO3
Molar mass
82.00 g/mol
Appearance
colorless solid
Density
1.65 g/cm3
Melting point
70.1 °C
Boiling point
decomposes
Solubility in water
miscible
Structure
Molecular shape
tetrahedral
Hazards
Main hazards
skin irritant
NFPA 704

0
2
1
 
R-phrases
22-35
S-phrases
26-36/37/39-45
Related compounds
Related compounds
H3PO4 (i.e., PO(OH)3)
H3PO2 (i.e., H2PO(OH))
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox references
Phosphorous acid is the compound described by the formula H3PO3. It is one of [...]

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