Registration Dossier
Registration Dossier
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EC number: 266-358-7 | CAS number: 66423-13-0
Phototransformation in water
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:
- 1 986
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 990
Materials and methods
- Study type:
- not specified
- Principles of method if other than guideline:
- no data
- GLP compliance:
- not specified
Test material
- 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
- Reference substance name:
- Mecoprop-P acid
- IUPAC Name:
- Mecoprop-P acid
- Reference substance name:
- MCPP-P acid
- IUPAC Name:
- MCPP-P acid
Constituent 1
Constituent 2
Constituent 3
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.
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