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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Classification & Labelling & PBT assessment

PBT assessment

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Administrative data

PBT assessment: overall result

PBT status:
the substance is not PBT / vPvB

Tetramethyl orthosilicate hydrolyses very rapidly in contact with water to methanol and silicic acid and therefore the substance does not meet the criteria for PBT or vPvB. Methanol is readily biodegradable and so is not persistent. Silicic acid is inorganic and biodegradation is not relevant. However, silicic acidis the water soluble form of inorganic silicon will enter the natural biogeochemical cycle for silicon, and therefore is not considered Persistent (P).

Silicic acid does not meet the criteria for B or T.

Therefore, the substance does not meet the criteria for PBT or vPvB.