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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

M4Q is predicted to hydrolyse with a half-life >200 - 2000 h at pH 7 and 25°C, based on an accepted estimation method
A half-life of 9 days for reaction with hydroxyl radicals in air has been calculated for M4Q. Phototransformation in water and soil are not expected to be significant removal processes for M4Q.
Biodegradation of 0% in 28 days has been read-across from a structurally-related substance M3T.

Table 4.1.12 Degradation rates

Degradation rate in water:

Hydrolysis half-life >200-2000 hours at pH 7 and 25°C for removal of parent (QSAR). No significant biodegradation of silanol hydrolysis product expected. 

Degradation rate in sediment:

No data are available regarding degradation in sediment.

Degradation rate in soil:

No data are available regarding degradation in soil.

Degradation rate in air:

Rate constant for reaction with OH radicals in air: 1.79 E-12 cm3 molecule-1 second-1 (half-life 9 days) (Calculated)

Additional information