Registration Dossier
Registration Dossier
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EC number: 249-636-2 | CAS number: 29450-45-1
Hydrolysis
Administrative data
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2007
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 007
- Report date:
- 2007
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.7 (Degradation: Abiotic Degradation: Hydrolysis as a Function of pH)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 2-ethylhexyl (4-chloro-2-methylphenoxy)acetate
- EC Number:
- 249-636-2
- EC Name:
- 2-ethylhexyl (4-chloro-2-methylphenoxy)acetate
- Cas Number:
- 29450-45-1
- Molecular formula:
- C17H25ClO3
- IUPAC Name:
- 2-ethylhexyl (4-chloro-2-methylphenoxy)acetate
- Reference substance name:
- (4-chloro-2-methylphenoxy)acetic acid
- EC Number:
- 202-360-6
- EC Name:
- (4-chloro-2-methylphenoxy)acetic acid
- Cas Number:
- 94-74-6
- Molecular formula:
- C9H9ClO3
- IUPAC Name:
- (4-chloro-2-methylphenoxy)acetic acid
- Test material form:
- liquid
Constituent 1
impurity 1
- Radiolabelling:
- no
Study design
- Analytical monitoring:
- yes
Results and discussion
- Transformation products:
- yes
Identity of transformation products
- No.:
- #1
Reference
- Reference substance name:
- Unnamed
- IUPAC name:
- (4-chloro-2-methylphenoxy)acetic acid
- Inventory number:
- InventoryMultipleMappingImpl [inventoryEntryValue=EC 202-360-6]
- CAS number:
- 94-74-6
- Identity:
- (4-chloro-2-methylphenoxy)acetic_acid
- Identity:
- Acetic acid, (4-chloro-2-methylphenoxy)-
- Molecular formula:
- C9H9ClO3
- Molecular weight:
- 200.619
- SMILES notation:
- Cc1cc(Cl)ccc1OCC(=O)O
- InChl:
- InChI=1/C9H9ClO3/c1-6-4-7(10)2-3-8(6)13-5-9(11)12/h2-4H,5H2,1H3,(H,11,12)
Dissipation DT50 of parent compound
- Key result
- pH:
- 7
- Temp.:
- 50 °C
- DT50:
- > 2 - < 8 h
- Type:
- (pseudo-)first order (= half-life)
Applicant's summary and conclusion
- Executive summary:
In order to determine the hydrolysis of MCPA-2EH the behaviour of the substance in water was investigated with MCPA-2EH technical. following acidification, partitioning with ethyl acetate and concentration the samples were analysed by reverse phase HPLC. HPLC analysis of the extracts showed that MCPA-2EH was rapidly degraded in natural water to MCPA acid.The determined half-life of MCPA-2H was below 8 hours at pH 7 and 50 °C and, thus, it is not stable and unlikely that MCPA-2 will be persistent in water.
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