04114
Phosphorous acid
≥98.5%
Synonym(s):
Phosphonic acid
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About This Item
Empirical Formula (Hill Notation):
H3O3P
CAS Number:
Molecular Weight:
82.00
UNSPSC Code:
12352106
PubChem Substance ID:
EC Number:
237-066-7
MDL number:
assay
≥98.5%
impurities
≤0.002% heavy metals (as Pb), ≤1% phosphoric acid (H3PO4)
density
1.651 g/mL at 25 °C (lit.)
anion traces
chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤10 mg/kg
cation traces
Fe: ≤5 mg/kg
SMILES string
[H]P(O)(O)=O
InChI
1S/H3O3P/c1-4(2)3/h4H,(H2,1,2,3)
InChI key
ABLZXFCXXLZCGV-UHFFFAOYSA-N
Application
Phosphorous acid (H3PO3) may be used for the synthesis of α-aminomethylphosphonic acids, via Mannich type reaction.
signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A
Storage Class
8A - Combustible corrosive hazardous materials
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
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Rickard DA.
Journal of Plant Nutrition, 22(36), 3537-3540 (1981)
Anodic oxidation mechanism of hypophosphorous and phosphorous acid on palladium.
Trasatti S and Alberti A.
Journal of Electroanalytical Chemistry, 12(3), 236-249 (1966)
Ping Yin et al.
Bioresource technology, 110, 258-263 (2012-02-22)
Esterification of oleic acid with ethanol catalyzed by organophosphonic acid-functionalized silica SG-T-P was optimized using response surface methodology (RSM). The interactive effect of catalyst to FFA weight ratio and molar ratio of alcohol to acid were more significant than that