An official website of the United States government

Phosphinous acid

PubChem CID
143409
Structure
Phosphinous acid_small.png
Phosphinous acid_3D_Structure.png
Molecular Formula
Synonyms
  • phosphinous acid
  • HPH2O
  • 25756-87-0
  • dihydridohydroxidophosphorus
  • [PH2(OH)]
Molecular Weight
49.997 g/mol
Computed by PubChem 2.2 (PubChem release 2021.10.14)
Dates
  • Create:
    2005-03-27
  • Modify:
    2025-01-25
Description
Phosphinous acid is a phosphorus oxoacid.

1 Structures

1.1 2D Structure

Chemical Structure Depiction
Phosphinous acid.png

1.2 3D Conformer

2 Names and Identifiers

2.1 Computed Descriptors

2.1.1 IUPAC Name

phosphinous acid
Computed by Lexichem TK 2.7.0 (PubChem release 2021.10.14)

2.1.2 InChI

InChI=1S/H3OP/c1-2/h1H,2H2
Computed by InChI 1.0.6 (PubChem release 2021.10.14)

2.1.3 InChIKey

RYIOLWQRQXDECZ-UHFFFAOYSA-N
Computed by InChI 1.0.6 (PubChem release 2021.10.14)

2.1.4 SMILES

OP
Computed by OEChem 2.3.0 (PubChem release 2024.12.12)

2.2 Molecular Formula

H3OP
Computed by PubChem 2.2 (PubChem release 2021.10.14)

2.3 Other Identifiers

2.3.1 CAS

2.3.2 ChEBI ID

2.3.3 DSSTox Substance ID

2.3.4 Nikkaji Number

2.3.5 Wikidata

2.3.6 Wikipedia

2.4 Synonyms

2.4.1 Depositor-Supplied Synonyms

3 Chemical and Physical Properties

3.1 Computed Properties

Property Name
Molecular Weight
Property Value
49.997 g/mol
Reference
Computed by PubChem 2.2 (PubChem release 2021.10.14)
Property Name
XLogP3-AA
Property Value
-0.6
Reference
Computed by XLogP3 3.0 (PubChem release 2021.10.14)
Property Name
Hydrogen Bond Donor Count
Property Value
1
Reference
Computed by Cactvs 3.4.8.18 (PubChem release 2021.10.14)
Property Name
Hydrogen Bond Acceptor Count
Property Value
1
Reference
Computed by Cactvs 3.4.8.18 (PubChem release 2021.10.14)
Property Name
Rotatable Bond Count
Property Value
0
Reference
Computed by Cactvs 3.4.8.18 (PubChem release 2021.10.14)
Property Name
Exact Mass
Property Value
49.992151713 Da
Reference
Computed by PubChem 2.2 (PubChem release 2021.10.14)
Property Name
Monoisotopic Mass
Property Value
49.992151713 Da
Reference
Computed by PubChem 2.2 (PubChem release 2021.10.14)
Property Name
Topological Polar Surface Area
Property Value
20.2 Ų
Reference
Computed by Cactvs 3.4.8.18 (PubChem release 2021.10.14)
Property Name
Heavy Atom Count
Property Value
2
Reference
Computed by PubChem
Property Name
Formal Charge
Property Value
0
Reference
Computed by PubChem
Property Name
Complexity
Property Value
2
Reference
Computed by Cactvs 3.4.8.18 (PubChem release 2021.10.14)
Property Name
Isotope Atom Count
Property Value
0
Reference
Computed by PubChem
Property Name
Defined Atom Stereocenter Count
Property Value
0
Reference
Computed by PubChem
Property Name
Undefined Atom Stereocenter Count
Property Value
0
Reference
Computed by PubChem
Property Name
Defined Bond Stereocenter Count
Property Value
0
Reference
Computed by PubChem
Property Name
Undefined Bond Stereocenter Count
Property Value
0
Reference
Computed by PubChem
Property Name
Covalently-Bonded Unit Count
Property Value
1
Reference
Computed by PubChem
Property Name
Compound Is Canonicalized
Property Value
Yes
Reference
Computed by PubChem (release 2021.10.14)

5 Chemical Vendors

6 Literature

6.1 Consolidated References

6.2 Springer Nature References

6.3 Chemical Co-Occurrences in Literature

6.4 Chemical-Gene Co-Occurrences in Literature

6.5 Chemical-Disease Co-Occurrences in Literature

7 Patents

7.1 Depositor-Supplied Patent Identifiers

7.2 WIPO PATENTSCOPE

7.3 Chemical Co-Occurrences in Patents

7.4 Chemical-Disease Co-Occurrences in Patents

7.5 Chemical-Gene Co-Occurrences in Patents

8 Classification

8.1 ChEBI Ontology

8.2 EPA DSSTox Classification

8.3 MolGenie Organic Chemistry Ontology

9 Information Sources

CONTENTS