Registration Dossier

Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Study period:
January 2021
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
calculation according to Mackay, Level III

Data source

Reference
Reference Type:
other: estimation software
Title:
Estimation Programs Interface Suite for Microsoft Windows, v4.11
Author:
US EPA
Year:
2012
Bibliographic source:
United States Environmental Protection Agency, Washington DC, USA

Materials and methods

Model:
calculation according to Mackay, Level III
Calculation programme:
MacKay Level III fugacity modelling EPIWEB v4.1
Media:
other: Air only as no release to water and soil are expected

Test material

Constituent 1
Chemical structure
Reference substance name:
Dichlorodifluoromethane
EC Number:
200-893-9
EC Name:
Dichlorodifluoromethane
Cas Number:
75-71-8
Molecular formula:
CCl2F2
IUPAC Name:
dichlorodifluoromethane
Details on test material:
As above
Specific details on test material used for the study:
SMILES notation: FC(F)(Cl)Cl

Study design

Test substance input data:
- Molar mass: 120.91
- Water solubility: 280 mg/l
- Vapour pressure: 4840 mm Hg (Mpbpwin program)
- Henry's LC: 0.343 atm.m3/mole (Henry database)
- log Pow: 2.16 (Kowwin program)
- Soil Koc: 43.9 (KOCWIN MCI method)


Input PC parameters were all default value of EpiSuite - fugacity model (Level III)
Emission value mode: The environmental emission rates are 1000 kg/hr to air only in the absence of process-related releases to water or soil.

Results and discussion

Percent distribution in media

Air (%):
100
Water (%):
0.008
Soil (%):
0.005
Sediment (%):
0

Applicant's summary and conclusion

Conclusions:
The potential environmental distribution of CFC-12 was estimated using an accepted fugacity model (Mackay Level III).
As water and soil emissions are not expected during use, the modelling was conducted considering only potential emissions to air as input. The model predicts the substance will preferentially partition to air (100%).