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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Other distribution data

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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

Constituent 1
Chemical structure
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.

Applicant's summary and conclusion