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Diss Factsheets

Administrative data

Endpoint:
phototransformation in water
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Reliable source.

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
1986
Reference Type:
study report
Title:
Unnamed
Year:
1990

Materials and methods

Study type:
not specified
Principles of method if other than guideline:
no data
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
(R)-2-(4-chloro-2-methylphenoxy)propionic acid
EC Number:
240-539-0
EC Name:
(R)-2-(4-chloro-2-methylphenoxy)propionic acid
Cas Number:
16484-77-8
Molecular formula:
C10H11ClO3
IUPAC Name:
(2R)-2-(4-chloro-2-methylphenoxy)propanoic acid
Constituent 2
Reference substance name:
Mecoprop-P acid
IUPAC Name:
Mecoprop-P acid
Constituent 3
Reference substance name:
MCPP-P acid
IUPAC Name:
MCPP-P acid

Results and discussion

% Degradationopen allclose all
% Degr.:
50
Sampling time:
680 h
Test condition:
pH 5
% Degr.:
50
Sampling time:
1 019 h
Test condition:
pH 7
% Degr.:
50
Sampling time:
415 h
Test condition:
pH 9

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Remarks:
expected to be a valid source
Conclusions:
For Mecoprop-P acid (MCPP-P acid) phototransformation in water revealed half-lives of 680, 1019 and 415 hours at pH 5, 7 and 9, respectively.
Executive summary:

Mecoprop-P n-octyl ester hydrolyses rapidly in natural water. Therefore, the hydrolysis product Mecoprop-P acid (MCPP-P acid) was used for further risk assessment of Mecoprop-P n-octyl ester in the environment.

 

For Mecoprop-P acid (MCPP-P acid) phototransformation in water revealed half-lives of 680, 1019 and 415 hours at pH 5, 7 and 9, respectively.