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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Significant bioaccumulation in aquatic organisms is not expected (log Pow of -0.4).

Key value for chemical safety assessment

Additional information

Betaines, C12-14 (even numbered)-alkyldimethyl (EC No. 931-700-2) and all other alkyl dimethyl betaines are readily biodegradable and the log Kow was determinated as -0.40 for Betaines, C12-14 (even numbered)-alkyldimethyl (EC No. 931-700-2). Therefore, Betaines, C12-14 (even numbered)-alkyldimethyl has a low potential for bioaccumulation.

According to the SRC KOWWIN v1.67 the additionally calculated log Pow´s for other alkyl dimethyl betaines range from 0.47 to 1.46. Therefore, the bioconcentration factor (BCF) was estimated for Betaines, coco alkyldimethyl, 1-Tetradecanaminium, N-(carboxymethyl)-N, N-dimethyl-, hydroxide, inner salt and 1-Dodecanaminium, N-(carboxymethyl)-N, N-dimethyl-, hydroxide, inner salt with the worst case log Pow data and the model (SRC BCFBAF v3.00) reveal a BCF of 70.79 for the alkyl dimethyl betaines

Taking the available information into account, a further study is not needed.