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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Additional physico-chemical information

Administrative data

Endpoint:
other: decomposition
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data from different sources among which handbook referenced in the ECHA guidance R7a as a reliable source.

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Physical constants of inorganic compounds
Author:
David R Lide
Year:
1990
Bibliographic source:
Handbook of Chemistry and Physics 71 th edition 4 - 87p88
Reference Type:
review article or handbook
Title:
Phosphorus, an Outline of its Chemistry, Biochemistry and Technoloy (Fourth Edition)
Author:
D. E. C. Corbridge
Year:
1990
Bibliographic source:
Studies in Inorganic chemistry 10, Elsevier, New York, p. 254
Reference Type:
review article or handbook
Title:
Kirk-Othmer encyclopedia of chemical technology. 5th Edition, Vol. 18
Author:
Herman F. Mark & others
Year:
2006
Bibliographic source:
Kirk-Othmer encyclopedia of chemical technology. 5th Edition, Vol. 18 (ISBN: 9780471485049)

Materials and methods

Test guideline
Qualifier:
no guideline required
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Phosphinic acid
EC Number:
228-601-5
EC Name:
Phosphinic acid
Cas Number:
6303-21-5
Molecular formula:
H3O2P
IUPAC Name:
phosphinic acid
Test material form:
solid: crystalline
Details on test material:
No data

Results and discussion

Results:
Hypophosphorus acid forms colourless deliquescent crystals which decompose above 130°C to phosphoric acid, phosphorous acid, hydrogen and phosphine, the latter containing sufficient diphosphine to make it spontaneously flammable.

Applicant's summary and conclusion

Conclusions:
Phosphinic acid forms colourless deliquescent crystals which decompose above 130°C to phosphoric acid, phosphorous acid, hydrogen and phosphine, the latter containing sufficient diphosphine to make it spontaneously flammable.
Executive summary:

According to different relevant sources (handbooks, peer review papers) phosphinic acid forms colourless deliquescent crystals which decompose above 130°C to phosphoric acid, phosphorous acid, hydrogen and phosphine, the latter containing sufficient diphosphine to make it spontaneously flammable.