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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

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:
1989
Bibliographic source:
J. Chem. Phys. Ref. Data Monograph (HSDB/6752)
Reference Type:
publication
Title:
No information
Author:
Brown, A.C. et al
Year:
1990
Bibliographic source:
Atmos. Environ. Path. Chem., 24A: 2499-511 (HSDB/6752)
Reference Type:
publication
Title:
No information
Author:
Carassiti, V. et al.
Year:
1997
Bibliographic source:
J. Environ. Path. Toxicol. Oncol., 16 (HSDB/6752)
Reference Type:
publication
Title:
No information
Author:
Cohen, N. and S.W. Benson
Year:
1987
Bibliographic source:
J. Phys. Chem, 91: 162-70 (HSDB/6752)
Reference Type:
publication
Title:
No information
Author:
Cohen, N. and S.W. Benson
Year:
1987
Bibliographic source:
J. Phys. Chem., 91: 171-5 (HSDB/6752)
Reference Type:
publication
Title:
No information
Author:
Fisher, D.A. et al
Year:
1990
Bibliographic source:
Nature, 344: 508-512 (HSDB/6752)
Reference Type:
publication
Title:
No information
Author:
Rattigan, O. et al
Year:
1993
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

Constituent 1
Reference substance name:
Ethane, 2,2-dichloro-1,1,1-trifluoro-
IUPAC Name:
Ethane, 2,2-dichloro-1,1,1-trifluoro-
Constituent 2
Chemical structure
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

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).