Registration Dossier
Registration Dossier
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EC number: 201-167-4 | CAS number: 79-01-6
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- (Q)SAR
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Use of validated QSAR, which is described extensively in peer-reveiwed literature. The substance falls within the application domain.
- Justification for type of information:
- 1. SOFTWARE
AOPWIN
2. MODEL (incl. version number)
v1.91 (2000)
3. SMILES OR OTHER IDENTIFIERS USED AS INPUT FOR THE MODEL
C(=CCL)(CL)CL
4. SCIENTIFIC VALIDITY OF THE (Q)SAR MODEL
Refer to attached report
5. APPLICABILITY DOMAIN
refer to attached report
6. ADEQUACY OF THE RESULT
The substance falls within the application domain.
- Principles of method if other than guideline:
- AOPWIN™ 2000. Version 1.91. U.S. Environmental Protection Agency. http://www.epa.gov/oppt/exposure/pubs/episuite.htm
- Estimation method (if used):
- AOPWIN™ 2000. Version 1.91. U.S. Environmental Protection Agency. http://www.epa.gov/oppt/exposure/pubs/episuite.htm
OVERALL OH Rate Constant = 0.8048 E-12 cm3/molecule-sec
HALF-LIFE = 13.291 Days (12-hr day; 1.5E6 OH/cm3) - Details on test conditions:
- Sensitiser (for indirect photolysis): OH
Sensitiser concentration: 1500000 OH/cm3 - Temp.:
- 25 °C
- Key result
- DT50:
- 13.29 d
- Test condition:
- 12-hr day; 1.5E6 OH/cm3
- Key result
- DT50:
- 2 239 d
- Test condition:
- at 7E11 mol/cm3 O3
Reference
Description of key information
Trichloroethylene undergoes reactions with hydroxyl radicals in the atmosphere. The half-life of trichloroethylene due to this reaction, based on a 12-hr day with a OH radical concentration of 1.5E6 OH/cm3 is 13.3 days.
Key value for chemical safety assessment
- Half-life in air:
- 13.3 d
Additional information
Trichloroethylene undergoes reactions with hydroxyl radicals in the atmosphere. The half-life of trichloroethylene due to this reaction, based on a 12-hr day with a OH radical concentration of 1.5E6 OH/cm3 is 13.3 days.
The calculated half-life of trichloroethylene due to this reaction is 13.3 days with a OH radical concentration of 1.5E6 OH/cm3 (AOPWIN, 2000), with an overall OH-rate constant of 8.048E-13cm3/molecule.sec. Trichloroethylene also reacts with ozone, nitrogen oxide and chlorine atoms in the atmosphere but this is thought to be an insignificant atmospheric degradation process.
Overall, trichloroethylene is rapidly degraded in the atmosphere.
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.
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