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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

BCF (terrestrial species):
1 200 000 L/kg ww

Additional information

There are no data on terrestrial bioaccumulation of decamethyltetrasiloxane, L4. In order to facilitate assessment of secondary poisoning via the terrestrial food chain, a predicted BCF is required. Although the log Kow of L4 (8.21) is outside the boundaries of EUSES model for bioaccumulation, a EUSES predicted bioconcentration factor for earthworm of 1.2E+06 l/kg wwt (based on a maximum acceptable log Kow of 8) is considered to be a reasonable approximation and has been used for the assessment. To enable assessment within CHESAR, this value is entered in the Key value field.