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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

Description of key information

The adsorption potential to soil or sediment is low. The mean of the calculated logKoc-values is: logKoc = 1.35.

Key value for chemical safety assessment

Koc at 20 °C:

Additional information

According to the Annexes VIII and IX of REACH "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 of melam is low, i.e. log Pow <-0.9, see Chapter 4.7. A relevant adsorption of melam to soil is therefore not expected and a waiving of the study is justified.

3 results are available from calculation methods. The mean of the 3 available log Koc was calculated according to the ECHA Guidance Documents on Info Requirements, R. to logKoc = 1.35, corresponding to Koc = 22.4.

The adsorption potential to soil or sediment is therefore low.

A further study with three soil types was disregarded because the reported and used spiking solution of 5 g melam/L methanol is not feasible, as the solubility of melam in methanol is 0.17 mg/L at 23 °C.