Ethene, homopolymer, oxidized, hydrolyzed, distn. residues, from C16-18 alcs. manuf.

Other distribution data

Administrative data

Endpoint:

other distribution data

Type of information:

migrated information: read-across based on grouping of substances (category approach)

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Assessment performed according to accepted models

Data source

Reference

Reference Type:

secondary source

Title:

Annex VI. Environmental Distribution Modelling.

Year:

2005

Bibliographic source:

In: Annex VI to the Long Chain Aliphatic Alcohols Category SIAR.

Materials and methods

Principles of method if other than guideline:

Method: other: Mackay Level I and Level III models

Test material

Test material information

Constituent 1

Reference substance name:

Icosan-1-ol

EC Number:

211-119-4

EC Name:

Icosan-1-ol

Cas Number:

629-96-9

Molecular formula:

C20H42O

IUPAC Name:

icosan-1-ol

Results and discussion

Any other information on results incl. tables

INPUT DATA USED:
Molecular weight: 298.5
Data temperature: 25 deg C
Log Kow: 7.75
Water Solubility: 0.0011 mg/l
Vapour pressure: 0.000015 Pa
Melting point: 66 deg C
half life in air: 13.1 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     1.61E-03%
Soil        97.8%
Water   1.96E-03%
Fish    5.52E-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        0.639   2.52E-05   2.41E-07
% in water      1.22     2.5       0.0111
% in sediment  47.5     97.5       0.433
% in soil      50.6      0.00199  99.6

The results reflect that the ultimate fate of 1-eicosanol is dependent on its route of release into the environment. 1-Eicosanol 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 1-eicosanol results in significant adsorption to sediment.