Registration Dossier

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: GLP status not known, information from published handbook, acceptable with restrictions

Data source

Reference
Reference Type:
review article or handbook
Title:
Illustrated Handbook of Physical-Chemical Properties and Environmental Fate for Organic Chemicals. Volume IV: oxygen, nitrogen and sulfur containing compounds
Author:
Mackay, D, Shiu, W-Y and Ma, K-C
Year:
1993
Bibliographic source:
CRC Press - Lewis Publishers, Boca Raton, FL

Materials and methods

Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the Illustrated Handbook of Physical-Chemical Properties and Environmental Fate for Organic Chemicals states that properties such as melting and boiling point and density are obtained from commonly used handbooks. Other properties such as solubility, vapour pressure and log Kow have been obtained from primary reference sources and handbooks. A range of referenced values is reported for each of these properties. Data have been evaluated and a selected ‘best value’ is given for each property and used in calculations of environmental distribution. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Remarks:
no data reported

Test material

Constituent 1
Chemical structure
Reference substance name:
Acetic acid
EC Number:
200-580-7
EC Name:
Acetic acid
Cas Number:
64-19-7
Molecular formula:
C2H4O2
IUPAC Name:
acetic acid
Details on test material:
No data reported
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material (migrated information):
No data reported

Study design

Estimation method (if used):
No data reported
Light source:
not specified
Details on light source:
No data reported
Details on test conditions:
No data reported

Results and discussion

Preliminary study:
No data reported
Test performance:
No data reported
Dissipation half-life of parent compound
DT50:
26.7 d
Test condition:
.
Results with reference substance:
No data reported

Any other information on results incl. tables

based on a measured rate constant of 0.6 x 10-12 cm3/molecule-sec for the vapor phase reaction with 5x105 hydroxyl radicals/cm3 in air at 25°C.

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable
Conclusions:
The half-life of acteic acid in air is calculated to be 26.7 days.
Executive summary:

The half-life of acteic acid in air is calculated to be 26.7 days. The Handbook by Mackay (1993) is peer-reviewed and is considered to be reliable and suitable for use as a key study for this endpoint.