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Environmental fate & pathways

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Abiotic degradation: Hydrolysis as a function of pH was determined according to OECD TG 111. This study showed that the substance is stable in acidic or neutral solutions (half life > 1 year at pH 4 and 7) but hydrolyses significantly in basic conditions (half life: 7.8 days at pH 9). However, degradation products are the corresponding acid and alcohol which are not classified for the environment in the Annex I of directive 67/548/EEC.


Biodegradation: The high trans quality (cis/trans: 10/90) is readily biodegradable according to OECD TG 301 F (Manometric Respirometry Test ) performed in GLP conditions. 89 % of biodegradation was measured after 28 days in the test conditions were all validity criteria were fulfilled. The biodegradation rate reached after the 10-day window (days 6 to 16) was 82 %, which exceeds the pass level of 60 %. Furthermore, biodegradation curves obtained with the reference substance Aniline alone and with the test material + Aniline showed no toxic effect of the test material on the microorganisms at the test concentration (100 mg/l).

This study clearly shows that the test material is fully degraded in the environment and does not induce long-term adverse effect on biota (non persistent material).

Bioaccumulation potential: The octanol-water partition coefficient of the substance was measured by the shake flask method following OECD 107, resulting in a Log Kow of 2.93. The substance is believed to have low potential for bioaccumulation.

Transport and distribution of the substance in the environment: According to the level III fugacity model from EPISUITE v4.00, the substance would be distributed between the four environmental compartments, air (0.497%), water (22.2%), soil (77.1%) and sediment (0.173%) with half-lives of 12 hours (air), 360 hours (water), 720 hours (soil) and 3240 hours (sediment).