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Environmental fate & pathways

Biodegradation in soil

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Description of key information

Although Tetramine di-C16-18 is biodegradable, a classification as not persistent according to the REACH guidance is for the time being not possible. This means that a half-life in soil of 1000000 days as suggested by EUSES for a not biodegrable substance is assumed for risk assessment purposes.

It should be noted however that based on the Kpsoil which is in the range of 10000 to 100000 L/kg already for a readily biodegradable substance a half-life in soil of 30000 days is assumed. This means that there is only a marginal difference in the PECsoil for a readily biodegradable substance or a substance which is considered not biodegradable (4.3% after 30 days and 9% after 180 days). Thus for a strongly sorbing substance the PEC in soil is almost independent from the fact whether the substance is readily biodegradable or not.

Considering the RMM during production and use in closed systems no or negligible emissions to soil are anticpated.

Based on the negligible emission to soil a further refinement of the biodegradation potential in soil is at this moment not considered.

Key value for chemical safety assessment

Half-life in soil:
1 000 000 d
at the temperature of:
12 °C

Additional information

Biodegradation in soil

Although Tetramine di-C16 -18 is biodegradable, a classification as not persistent according to the REACH guidance is for the time being not possible. This means that a half-life in soil of 1000000 days is assumed for risk assessment purposes.

It should be noted however that based on the Kpsoil which is in the range of 10000 to 100000 L/kg already for a readily biodegradable substance a half-life in soil of 30000 days is assumed. This means that there is only a marginal difference in the PECsoil for a readily biodegradable substance or a substance which is considered not biodegradable (4.3% after 30 days and 9% after 180 days). Thus for a strongly sorbing substance the PEC in soil is almost independent from the fact whether the substance is readily biodegradable or not.

Considering the RMM during production and use in closed systems no or negligible emissions to soil are anticipated.

Based on the negligible emission to soil a further refinement of the biodegradation potential in soil is at this moment not considered.