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Environmental fate & pathways

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Measured bioconcentration factors (BCF) for dicyclohexylamine are not available.

Taking into account the octanol-water partition coefficients, bioconcentration factors for the neutral and the protonated forms of dicyclohexylamine can be estimated with the BCFWIN program (v2.15). For the neutral form a BCF of 459 was calculated using the log Kow of 4.37. For the protonated form a BCF of 3 (default value), using the log Kow of 1.26, is obtained (Bayer Industry Services, 2005e).

Estimated bioaccumulation (BCFBAF v3.00) using the measured log P, logP = 2.724 measured at pH 6.7 (Research Institute for Organic Syntheses Inc., 2010) was BCF = 29.13 L/kg wet-wt (Log BCF from regression-based method = 1.464). The bioconcentration factor is very low, but comparable to BCF value for protonated form reported by Bayer Industry Services, 2005e.

Since dicyclohexylamine occurs in the protonated form in the environment, the BCF of this form is taken into account to estimate a bioaccumulation potential for dicyclohexylamine. The BCF of 3.2 and also estimated bioaccumulation using the measured log P (Research Institute for Organic Syntheses Inc., 2010), BCF = 29.13 L/kg wet-wt indicates that there is no significant bioaccumulation potential of dicyclohexylamine in aquatic organisms (OECD, 2006).