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Environmental fate & pathways

Adsorption / desorption

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Description of key information

A calculation of the KOC with the test substance and a supporting study with the structural related substance 1,2,4 -Benzenetricarboxylic acid, mixed decyl and octyl triesters both showed a value > 5000. Therefore the substance 1,2,4 -Benzenetricarboxylic acid, mixed dodecyl and octyl triesters is considered as immobile in soil.

Key value for chemical safety assessment

Additional information

KOC has been calculated with the test substances 1,2,4 -Benzenetricarboxylic acid, mixed dodecyl and octyl triesters using the computer program KOCWIN (v2.00). It is predicted that the substance has a KOC of 947000000 L/kg (MCI method, log KOC 8.976) and of 260000000 (KOW method, log KOC 8.416).

One study was performed in order to estimate the adsorption coefficient on soil and sewage sludge of the structural related substance 1,2,4 -Benzenetricarboxylic acid, decyl octyl ester (CAS No. 67989 -23 -5) / 1,2,4 -Benzenetricarboxylic acid, mixed decyl and octyl triesters (CAS No. 90218 -76 -1) using the HPLC-method according to OECD Guideline for the Testing of Chemicals No. 121. The log KOC is estimated to be > 5.67 and the KOC > 467735 and above 5000.

Therefore according to McCall et al., 1981 with a value of > 5000 the test substance is considered as immobile in soil.