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Environmental fate & pathways

Adsorption / desorption

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Description of key information

REACH criterion for waiving: "The study does not need to be conducted if: – based on the physicochemical properties the substance can be expected to have a low potential for adsorption (e.g. the substance has a low octanol-water partition coefficient);..."
The partition coefficients is low. (logPow = -3.1 to -3.0, see section 4.7.)

Key value for chemical safety assessment

Additional information

The QSAR-estimated logKoc is low, i.e. in the range of 1.1 to 1.5, depending on the 2 methods used.

In an outdated QSAR-estimation, based on the water solubility, the log Koc is 1.7.

A relevant adsorption of melamine to soil is therefore not expected and a waiving of the study is justified.