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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

The alkyl-1,3-diaminopropanes are readily biodegradable and it is therefore unlikely that they will accumulate in the food chain. Since there is a measured log Kow value, this is used to predict the bioaccumulation potential. Based on the measured log Kow value of 1.5 the calculated log BCF is 0.66 (BCF = 4.6; EpiSuite v4.0).

Key value for chemical safety assessment

BCF (aquatic species):
4.6 dimensionless

Additional information

Although the calculated log Kow value of 7.69 (EPIsuite v4.0) for the unprotonated N-(hydrogenated tallow alkyl)trimethylendiamines (CAS no 68603-64-5) is clearly higher than the measured value of 1.5 (OECD 123), preference is given to base the calculated BCF on the measured log Kow value. The calculated BCF value of 4.6 indicates that alkyl-1,3-diaminopropanes have a low bioaccumulation potential. The low calculated BCF is considered to be realistic as the fraction of unprotonated amines will be very low in the environment.

The alkyl-1,3-diaminopropanes are readily biodegradable and it is therefore unlikely that they will accumulate in the food chain. The predicted BCF value could even be lower, as the calculation of the BCF is not taking into account metabolism of the compound, e.g. by fish and other aquatic organisms. 

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