Registration Dossier

Administrative data

Endpoint:
hydrolysis
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Study period:
June 1998
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1998
Report Date:
1998

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method C.7 (Degradation: Abiotic Degradation: Hydrolysis as a Function of pH)
Qualifier:
according to
Guideline:
OECD Guideline 111 (Hydrolysis as a Function of pH)
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): RA 3643
- Physical state: white powder

Study design

Analytical monitoring:
no
Estimation method (if used):
The test item is a hydrophobic molecule with a low solubility in water, containing 2 ester bonds that may hydrolyse at high pH value.
The result is based on the solubility in water, the results of the biodegradability (the substance is not ready biodegradable) and comparison with a related molecule.

Results and discussion

Dissipation half-life of parent compound
Half-life:
> 1 h
Remarks on result:
other: Estimation method

Applicant's summary and conclusion

Conclusions:
Combining the information of water solubility, biodegradability test and the structural aspects of the molecule it is clear that RA3643 may hydrolyse, but the approximate rate is difficult to assess from the biodegradation test due to the insolubility of the substance. With a higher pH value of 9.0 and a high temperature, the hydrolysis half life of < 1 year may be assumed. However, comparing the properties of test item with a molecule with a related structure suggest that this may not be the case. It was concluded that RA 3643 can be considered to be hydrolytically stable , i.e. it has a half life > 1 year.