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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties


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Administrative data

Link to relevant study record(s)

flammable liquids: obsolete as covered by section 'Flash point'
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the substance is a liquid

Description of key information

The substance, tetramethylsilane, CAS 75-76-3; EC No. 200-899-1:

•       Is extremely flammable (based on a measured flash point of <-30°C at 1013 hPa and boiling point 27°C at 1013 hPa).

•       In contact with water does not emit a flammable gas.

•       Is not pyrophoric.

Key value for chemical safety assessment


Additional information

The flammability study is not required for liquids as flammability is assessed on the basis of flash point.

There is no indication on the basis of structure and experience in handling and use, that the substance is pyrophoric (flammable in contact with air) or flammable in contact with water.

Therefore, in accordance with Section 1 of REACH Annex XI, there is no need to conduct further flammability testing

Justification for classification or non-classification

Flammability of liquid:

The substance is classified as a Flammable Liquid Category 1 (H224: Extremely flammable liquid and vapour) according to Regulation (EC) No. 1272/2008. This is on the basis of a flash point of <-30°C and a boiling point of 27°C at 1013 hPa.

Flammability in contact with air:
There is no evidence to suggest that the submission substance should be classified for this hazard on the basis of Regulation (EC) No. 1272/2008.


Flammability in contact with water:
There is no evidence to suggest that the submission substance should be classified for flammability in contact with water on the basis of Regulation (EC) No. 1272/2008.