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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 206-190-3 | CAS number: 306-83-2
Phototransformation in air
Administrative data
- Endpoint:
- phototransformation in air
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Estimated value based on accepted model. Only study summary reviewed from secondary source.
Data source
Referenceopen allclose all
- Reference Type:
- publication
- Title:
- No information
- Author:
- Atkinson, R.
- Year:
- 1 989
- Bibliographic source:
- J. Chem. Phys. Ref. Data Monograph (HSDB/6752)
- Reference Type:
- publication
- Title:
- No information
- Author:
- Brown, A.C. et al
- Year:
- 1 990
- Bibliographic source:
- Atmos. Environ. Path. Chem., 24A: 2499-511 (HSDB/6752)
- Reference Type:
- publication
- Title:
- No information
- Author:
- Carassiti, V. et al.
- Year:
- 1 997
- Bibliographic source:
- J. Environ. Path. Toxicol. Oncol., 16 (HSDB/6752)
- Reference Type:
- publication
- Title:
- No information
- Author:
- Cohen, N. and S.W. Benson
- Year:
- 1 987
- Bibliographic source:
- J. Phys. Chem, 91: 162-70 (HSDB/6752)
- Reference Type:
- publication
- Title:
- No information
- Author:
- Cohen, N. and S.W. Benson
- Year:
- 1 987
- Bibliographic source:
- J. Phys. Chem., 91: 171-5 (HSDB/6752)
- Reference Type:
- publication
- Title:
- No information
- Author:
- Fisher, D.A. et al
- Year:
- 1 990
- Bibliographic source:
- Nature, 344: 508-512 (HSDB/6752)
- Reference Type:
- publication
- Title:
- No information
- Author:
- Rattigan, O. et al
- Year:
- 1 993
- Bibliographic source:
- SPA-AFEAS Final Report (P91-69)
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: modeled
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Ethane, 2,2-dichloro-1,1,1-trifluoro-
- IUPAC Name:
- Ethane, 2,2-dichloro-1,1,1-trifluoro-
- Reference substance name:
- 2,2-dichloro-1,1,1-trifluoroethane
- EC Number:
- 206-190-3
- EC Name:
- 2,2-dichloro-1,1,1-trifluoroethane
- Cas Number:
- 306-83-2
- Molecular formula:
- C2HCl2F3
- IUPAC Name:
- 2,2-dichloro-1,1,1-trifluoroethane
- Details on test material:
- - Name of test material (as cited in study report): Ethane, 2,2-dichloro-1,1,1-trifluoro, HCFC-123
Constituent 1
Constituent 2
Study design
- Light source:
- not specified
- Details on light source:
- Relative intensity based on intensity of sunlight.
Results and discussion
Any other information on results incl. tables
The calculated atmospheric lifetime for HCFC-123 ranges from 1.2-2.4 years (Fisher et al., 1990; Carasiti et al., 1997). Experimental rate constants for the gas-phase reaction of HCFC-123 with photochemically produced hydroxyl radicals of 1.4x10-14 cm3/molec-sec (Cohen and Benson, 1987a; 1987b) and 5.9x10-14 cm3/molec-sec at 303 K (Brown et al., 1990) have been reported. The recommended value of 3.35x10-14 cm3/molec-sec (Atkinson, 1989) translates to an atmospheric half-life of 479 days using an average hydroxyl radical concentration of 5x105 molecules/cm3 (Atkinson, 1989). HCFC-123 is removed predominately in the lower troposphere due to the reaction with the hydroxyl radical (Rattigan et al., 1993).
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- The calculated atmospheric lifetime for HCFC-123 ranges from 1.2-2.4 years (Fisher et al., 1990; Carasiti et al., 1997). Experimental rate constants for the gas-phase reaction of HCFC-123 with photochemically produced hydroxyl radicals of 1.4E-14 cm3/molec-sec (Cohen and Benson, 1987a; 1987b) and 5.9E-14 cm3/molec-sec at 303 degrees K (Brown et al., 1990) have been reported. The recommended value of 3.35E-14 cm3/molec-sec (Atkinson, 1989) translates to an atmospheric half-life of 479 days using an average hydroxyl radical concentration of 5E5 molecules/cm3 (Atkinson, 1989). HCFC-123 is removed predominately in the lower troposphere due to the reaction with the hydroxyl radical (Rattigan et al., 1993).
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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