All Photos(5)
Synonym(s):
Phosphonic acid
Empirical Formula (Hill Notation):
H3O3P
CAS Number:
Molecular Weight:
82.00
EC Number:
MDL number:
UNSPSC Code:
12352106
PubChem Substance ID:
NACRES:
NA.21
Quality Level
assay
99%
form
crystals or chunks
flakes
solubility
water: soluble
density
1.651 g/mL at 25 °C (lit.)
SMILES string
[H]P(O)(O)=O
InChI
1S/H3O3P/c1-4(2)3/h4H,(H2,1,2,3)
InChI key
ABLZXFCXXLZCGV-UHFFFAOYSA-N
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General description
Phosphorous acid (or phosphonic acid) is a phosphorus oxoacid commonly used as an intermediate in chemical synthesis for the production of various phosphorus compounds. It is also used as a strong reducing agent in organic synthesis.
Application
Phosphorous acid (H3PO3, orthophosphorous acid) may be used as one of the reaction components for the synthesis of the following:
- α-aminomethylphosphonic acids via Mannich-Type Multicomponent Reaction
- 1-aminoalkanephosphonic acids via amidoalkylation followed by hydrolysis
- N-protected α-aminophosphonic acids (phospho-isosteres of natural amino acids) via amidoalkylation reaction
signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A
wgk_germany
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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Amidoalkylation of phosphorous acid.
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Poly(3-hexyl thiophene) containing chain-end thiols or phosphonic acids is crystallized to yield nanowires with the functional groups at the wire edges. CdSe quantum dots and nanorods associate with these fibrils, leading to 'superhighways' that consist of alternating parallel lanes of
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On alpine pastureland the decline in large-bodied earthworm numbers and biomass after abandonment of management might be the result of a shift from highly palatable grass litter to poorly digestible leaf litter of dwarf shrubs. To test this hypothesis, we
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In a recent publication, we have highlighted the potential of phosphonic acid terminated PEG oligomers to functionalize strong UV absorption cerium oxide nanoparticles, which yield suspensions that are stable in aqueous or organic solvents and are redispersible in different solvents
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