Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 210-195-6 | CAS number: 609-66-5
Phototransformation in water
Administrative data
- Endpoint:
- phototransformation in water
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP study according to EU/OECD guideline.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 002
Materials and methods
- Study type:
- direct photolysis
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline draft (Phototransformation of Chemicals in Water - Direct and Indirect Photolysis)
- GLP compliance:
- yes
Test material
- Reference substance name:
- 2-chlorobenzamide
- EC Number:
- 210-195-6
- EC Name:
- 2-chlorobenzamide
- Cas Number:
- 609-66-5
- Molecular formula:
- C7H6ClNO
- IUPAC Name:
- 2-chlorobenzamide
Constituent 1
Study design
- Radiolabelling:
- yes
- Analytical method:
- high-performance liquid chromatography
- Light source:
- other: mercury immersion lamp TQ 150 (Original Hanau Co.).
- Light spectrum: wavelength in nm:
- >= 295 - <= 490
- Relative light intensity:
- >= 1.3 - <= 100
Duration of test at given test condition
- Duration:
- 500 min
- Temp.:
- 25 °C
- Initial conc. measured:
- 5.28 mg/L
- Reference substance:
- no
- Dark controls:
- no
Results and discussion
- Quantum yield (for direct photolysis):
- 0.002
- Predicted environmental photolytic half-life:
- The estimates based on two different arithmetic models (GC-SOLAR and Frank & Klöpffer) by means of the resulting quantum yield and the light
absorption in a range of wavelengths relevant for the environment were well comparable when considering identical marginal conditions. "Environmental direct photolysis half-lives" of more than 95 days can be calculated for the test item.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- Only very weak degradation of the test item was measured by HPLC-UV during the maximum irradiation period of 500 minutes in pure water. This indicated a high stability of the test item against direct photo-degradation in aqueous solution relative to other compounds irradiated under the
same study conditions.
However, this assessment does not consider any indirect mechanisms, which may enhance the photodegradation in natural water.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
