Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Monitoring data

Currently viewing:

Administrative data

Endpoint:
monitoring data
Type of information:
other: OECD SIDS
Adequacy of study:
other information
Reliability:
other: OECD SIDS
Rationale for reliability incl. deficiencies:
other: No reliability is given as this is a summary entry for the OECD SIDS.

Data source

Referenceopen allclose all

Reference Type:
secondary source
Title:
Dimethyl phosphonate - CAS No: 868-85-9 - SIDS Initial Assessment Report.
Author:
OECD
Year:
2004
Bibliographic source:
UNEP Publications
Reference Type:
publication
Title:
Dimethyl hydrogen phosphite.
Author:
IARC
Year:
1990
Bibliographic source:
International Agency for Research on Cancer (ed.) IARC monographs on the evaluation of carcinogenic risks to humans some flame retardants and textile chemicals, and exposures in the textile manufacturing industry, Lyon , 21-28/02/1989, 48, 85¿93.
Reference Type:
publication
Title:
Microbial Metabolism and Enzymology of Selected Pesticides.
Author:
Munnecke DM, Johnson LM, Talbot HW and Barik S
Year:
1982
Bibliographic source:
Chakrabarty AM (ed) Biodegradation and Detoxification of Environmental Pollutants, CRC Press, Boca Raton, pp 1 - 32.
Reference Type:
publication
Title:
The toxicity of the hydrolysis and breakdown products of malathion to the fathead minnow.
Author:
Bender ME
Year:
1969
Bibliographic source:
Water Research b,571-582.
Reference Type:
publication
Title:
Fate of pesticides in the environment - a progress report.
Author:
Wilson BR
Year:
1966
Bibliographic source:
Trans New York Acad Sci 28 (6), 694 - 705.

Materials and methods

Principles of method if other than guideline:
OECD SIDS
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Dimethyl phosphonate
EC Number:
212-783-8
EC Name:
Dimethyl phosphonate
Cas Number:
868-85-9
Molecular formula:
C2H7O3P
IUPAC Name:
dimethyl phosphonate

Results and discussion

Any other information on results incl. tables

OECDS SIDS (2004) - Environmental Monitoring:

 

There is no information on DMP concentrations in the environment.

 

IARC (1990) reports that DMP "is not known to occur as a natural product."

 

IARC (1990) also reports that DMP "is a degradation product of trichlorfon and malathion" (page 87 of IARC, 1990). Trichlorfon (dimethyl-p-(2,2,2-trichlor-1-hydroxyethyl)-phosphonate) contains a pentavalent phosphorous. Predicted from its chemical structure, the degradation of trichlorfon leads to inorganic phosphate. Malathion (O,O-dimethyl-S (1,2-dicarbethoxyethyl)-phosphorodithioate) is a phosphorodithionic acid derivative whose hydrolysis is thought to proceed to thiophosphates and (inorganic) phosphate (Munnecke et al. 1982). Intermediates of malathione hydrolysis are dimethyl phosphorothionic acid and dimethyl phosphorodithionic acid (Bender, 1969). Although it was stated by Wilson (1966) that DMP is a hydrolysis product of malathion, Bender (1969) made it clear that this was only a postulate.

Applicant's summary and conclusion