Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

An adsorption/desorption screening study was not initiated since the substance is readily biodegradable and thus decompose rapidly. The logPow is calculated according to QSAR (EPI Suite- KOWWIN v1.67) to be in the range of 11.2 for hexadecyl nonanoate and 12.2 octadecyl nonanoate.

Nevertheless, the adsorption/desorption coefficient for SymMollient® S was calculated with QSAR (EpiSuite - KOCWIN v2.00). Two methods were used (i) MCI method and (ii) logPow method. Result: logKoc: 6.2 and for hexadecyl nonanoate and 6.8 and 7.6 for octadecyl nonanoate, respectively.

Henry´s Law constant / Volatilisation

Based on the vapour pressure of the substance (3*10-5Pa (25°C)), SymMollient® S can safely be considered as non-volatile. In addition, the Henry`s law constant is calculated on the basis of the experimental determination of water solubility and vapour pressure at 2.29 Pa m³/mol. Based on this indicates volatilisation from water or wet surfaces cannot completely ruled out.

Distribution modelling

According to a fugacity model calculation using EpiSuite v4.1 (Fugacity Model Level III), the distribution of both components of SymMollient® S between the environmental compartments air, soil and water is as follows:

C16: soil 75.2 %, sediment 0.162 %, water 23.9%, and air 0.717 %.

C18: soil 76.5 %, sediment 0.054 %, water 22.9%, and air 0.577 %.