Registration Dossier
Registration Dossier
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EC number: 940-543-9 | CAS number: 354-15-4
Phototransformation in air
Administrative data
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Data source is authoritative.
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 2 002
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- GLP compliance:
- not specified
Test material
- Reference substance name:
- 1,1,2-trichloro-1,2-difluoroethane
- EC Number:
- 940-543-9
- Cas Number:
- 354-15-4
- Molecular formula:
- C2HCl3F2
- IUPAC Name:
- 1,1,2-trichloro-1,2-difluoroethane
- Test material form:
- other: liquid
- Details on test material:
- - Name of test material (as cited in study report): CHFCl–CFCl2
Two samples from two different sources were analized:
Sample 1:
- Analytical purity: >99.7 %
Sample 2:
- Analytical purity: >98.3%
- Impurities (identity and concentrations): CHCl2CF2Cl as main impurities
Constituent 1
Results and discussion
Any other information on results incl. tables
Atmospheric lifetime = 3.4 years
Relative radiative forcing (RRFi CFC-11) = 0.91
HGWP = 0.051
HGWP at 20 years = 0.15
HGWP at 100 years = 0.059
HGWP at 500 years = 0.051
GWP at 20 years = 770
GWP at 100 years = 240
GWP at 500 years = 71
In the attached table the integrated band intensities of HCFC-122a.
Applicant's summary and conclusion
- Conclusions:
- Atmospheric lifetime = 3.4 years
Relative radiative forcing (RRFi CFC-11) = 0.91
HGWP = 0.051
HGWP at 20 years = 0.15
HGWP at 100 years = 0.059
HGWP at 500 years = 0.051
GWP at 20 years = 770
GWP at 100 years = 240
GWP at 500 years = 71 - Executive summary:
In the study the infrared absorption cross-sections and integrated band intensities (IBIs) for 21 haloalkanes, including HCFC 122a, were measured over thewavenumber range 400–1600 cm−1 atT=295 K. The effect of air pressure on measured spectra was also investigated. These results were used to demonstrate a simple calculational approach for estimating the direct global warming potentials (GWPs) of such chemicals.
Direct GWPs were determined using these measured spectra and a simple numerical procedure based on the measured spectrum of the Earth’s outgoing radiation. The results obtained with this procedure agree with those from elaborate modeling calculations.
The following values for HCFC 122a are reported:
Atmospheric lifetime = 3.4 years
Relative radiative forcing (RRFi CFC-11) = 0.91
HGWP = 0.051
HGWP at 20 years = 0.15
HGWP at 100 years = 0.059
HGWP at 500 years = 0.051
GWP at 20 years = 770
GWP at 100 years = 240
GWP at 500 years = 71
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