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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Reference substances

Reference substances

Currently viewing:
IUPAC name:
phosphonic acid

Inventory

EC number:
237-066-7
EC name:
Phosphonic acid
CAS number:
13598-36-2
CAS number:
13598-36-2
Synonyms
Names:
Dihydroxyphosphine oxide
Orthophosphorus acid
Phosphonic acid
Phosphorous acid
Phosphorous acid
Phosphorus trihydroxide
Trihydroxyphosphine
Identifier:
IUPAC name
Phosphonic acid
Identifier:
IUPAC name
Phosphorous acid
Identifier:
other: InChl
InChI=1/H3O3P/c1-4(2)3/h1-3H
Identifier:
other: InChl
InChI=1S/H3O3P/c1-4(2)3/h1-3H
Identifier:
other: SMILES notation
Not relevant
Identifier:
other: InChl
Not relevant
Identifier:
other: SMILES notation
OP(O)=O
Identifier:
other: SMILES notation
OP(O)O
Identifier:
other: SMILES notation
O[P](=O)O
Identifier:
other: SMILES notation
P(O)(O)O
phosphonic acid

Molecular and structural information

Molecular formula:
H3O3P
Molecular weight:
81.996
SMILES notation:
OP(=O)O
InChl:
InChI=1/H3O3P/c1-4(2)3/h4H,(H2,1,2,3)
Structural formula:
Chemical structure

Related substances

Identifier:
CAS number
Identity:
10294-56-1