N-(1,3-dimethylbutylidene)-5-[(1,3-dimethylbutylidene)amino]-1,3,3-trimethylcyclohexanemethylamine

Adsorption / desorption

Link to relevant study record(s)

Reference

Endpoint:

adsorption / desorption: screening

Type of information:

experimental study

Adequacy of study:

key study

Study period:

28.07.2014 - 22.10.2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method C.19 (Estimation of the Adsorption Coefficient (KOC) on Soil and Sewage Sludge Using High Performance Liquid Chromatography (HPLC))

Qualifier:

according to guideline

Guideline:

OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC))

GLP compliance:

yes

Type of method:

HPLC estimation method

Media:

sediment

Specific details on test material used for the study:

Identification: CAS# 71077-09-3
Appearance/Physical State: Pale yellow liquid
Batch: 76200
Purity: 98.7%
Expiry Date: 30 April 2015
Storage Conditions: Room temperature in the dark

Radiolabelling:

not specified

Key result

Remarks on result:

not determinable

Remarks:

A preliminary assessment of the test item indicated that it would be at least partially ionized across the entire environmentally relevant pH range (pH 5 to 7). Therefore, it is anticipated that adsorption to the organic carbon content of soils and sediments will not be the dominant mechanism controlling the mobility of the test item in the environment. Adsorption of cationic species occurs primarily by an ion-exchange mechanism and thus depends on the cation-exchange capacity of the sorbent as well as a variety of other parameters (Boethling, R. S. 1994. Environmental aspects of cationic surfactants. In J. Cross and E. J. and Singer (ed.), Cationic Surfactants: Analytical and Biological Evaluation, vol. 53. Marcel Dekker, Inc., New York, USA.). Consequently, the true adsorption coefficient of the test item will be significantly higher than any Koc values determined by the EC C19 / OECD 121 method and via any computer-based Koc estimation software.

Conclusions:

A preliminary assessment of the test item indicated that it would be at least partially ionized across the entire environmentally relevant pH range (pH 5 to 7). Therefore, it is anticipated that adsorption to the organic carbon content of soils and sediments will not be the dominant mechanism controlling the mobility of the test item in the environment. Adsorption of cationic species occurs primarily by an ion-exchange mechanism and thus depends on the cation-exchange capacity of the sorbent as well as a variety of other parameters (Boethling, R. S. 1994. Environmental aspects of cationic surfactants. In J. Cross and E. J. and Singer (ed.), Cationic Surfactants: Analytical and Biological Evaluation, vol. 53. Marcel Dekker, Inc., New York, USA.). Consequently, the true adsorption coefficient of the test item will be significantly higher than any Koc values determined by the EC C19 / OECD 121 method and via any computer-based Koc estimation software.
Therefore, based on the expected high cation-exchange ability of the test item, the test item is anticipated to be essentially immobile in the environment.

Description of key information

A preliminary assessment of the test item indicated that it would be at least partially ionized across the entire environmentally relevant pH range (pH 5 to 7). Therefore, it is anticipated that adsorption to the organic carbon content of soils and sediments will not be the dominant mechanism controlling the mobility of the test item in the environment. Adsorption of cationic species occurs primarily by an ion-exchange mechanism and thus depends on the cation-exchange capacity of the sorbent as well as a variety of other parameters (Boethling, R. S. 1994. Environmental aspects of cationic surfactants. In J. Cross and E. J. and Singer (ed.), Cationic Surfactants: Analytical and Biological Evaluation, vol. 53. Marcel Dekker, Inc., New York, USA.). Consequently, the true adsorption coefficient of the test item will be significantly higher than any Koc values determined by the EC C19 / OECD 121 method and via any computer-based Koc estimation software.

Therefore, based on the expected high cation-exchange ability of the test item, the test item is anticipated to be essentially immobile in the environment.