Registration Dossier

Administrative data

Endpoint:
other distribution data
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2005
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Assessment performed according to accepted models and

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2005

Materials and methods

Principles of method if other than guideline:
Method: other: Mackay Level I and Level III models

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Any other information on results incl. tables

INPUT DATA USED:
Molecular weight 268.5
Data temperature 25 deg C
Log Kow 7.07
Water Solubility 0.0077 mg/l
Vapour pressure 0.00198 Pa
Melting point 17 deg C
half life in air 4.8 h
half life in water and soil 720 h

RESULTS
The % environmental distribution calculated from the above parameters  using the MacKay level 1 model is as follows:

Air         0.13%
Soil        97.6%
Water   9.38E-03%
Fish    5.51E-03%
Sediment    2.17%

The Level III program has also been used, with the default
model, using the same input parameters.The distribution between  compartments obtained is as follows:

Release:       To air   To water   To soil
% in air        8.01     0.000579  9.86E-06
% in water      1.17     2.65      0.0105
% in sediment  42.9     97.3       0.383
% in soil      47.9      0.00347  99.6

The results reflect that the ultimate fate of 9Z-octadecen-1-ol is  dependent on its route of release into the environment.   9Z-octadecen-1-ol released to air would partially precipitate to soil and  water. There is relatively little movement between soil and water,  because transfer via the air compartment is very slow, for a substance of  low volatility.In water, the adsorption coefficient of 9Z-octadecen-1-ol  results in significant adsorption to sediment.

Applicant's summary and conclusion