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Environmental fate & pathways

Biodegradation in soil

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biodegradation in soil: simulation testing
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other justification
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Description of key information

Key value for chemical safety assessment

Half-life in soil:
3 000 d
at the temperature of:
12 °C

Additional information

For N-[2-(piperazin-1-yl)ethyl]C18-insaturated-alkylamide 36% biodegradation was observed in a closed bottle test (Ginkel 1990). This substance should therefore not be classified as readily biodegradable. Partial biodegradation of N-[2 -(piperazin-1 -yl)ethyl]C18 -insaturated-alkylamide was anticipated because 1-Piperazineethanamine  (CAS Num: 140 -31 -8) was observed and is most likely not easily further degraded (see attached document). This means that the parent; N-[2 -(piperazin-1 -yl)ethyl]C18 -insaturated-alkylamide is most likely completely removed within 28 days in the ready test.

Based on the uses claimed for N-[2-(piperazin-1 -yl)ethyl]C18-insaturated-alkylamide soil exposure is likely. It is however very unlikely that further degradation of 1 -Piperazineethanamine will occur in soil. Further testing in soil is therefore not expected to deliver more information. For soil therefore a worst-case half life value of 3000 days (Kd = 3004 L/kg) is used. In accordance with column 2 of REACH annex IX, further degradation testing does not need to be conducted as the chemical safety assessment does not indicate a need for further investigation.