tert-butylchlorodimethylsilane

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2015-04-03 to 2015-12-11

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

Version / remarks:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.10: “Flammability (Solids)”, Official Journal of the European Union no. L142, May 31, 2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)

Version / remarks:

United Nations (UN), UN no. ST/SG/AC.10/11/Rev.5: Recommendations on the Transport of Dangerous Goods, Part III: Classification Procedures, Test Methods and Criteria Relating to Class 2, Class 3, Class 4, Division 5.1, Class 8 and Class 9, Test N.1: “Test Method for Readily Combustible Solids”, 2009

Deviations:

no

GLP compliance:

yes

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 507122
- Expiration date of the lot/batch: 2015-12-28

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: At room temperature
- Stability under test conditions: Stable under storage condition until expiry date

Key result

Test procedure:

burning rate test: preliminary screening test

Burning time:

2 s

Remarks on result:

other: The burning time over a distance of 200 mm, after the pile had burned a distance of 50 mm, was 2 seconds. The test substance melted and burned with an orange yellow flame and turned into a brown grey residue. Extensive black smoke was observed.

Key result

Test procedure:

burning rate test over 100 mm length

Burning time:

1 s

Remarks on result:

flame passes the wetted zone

Remarks:

The burning time over 100 mm, after the pile had burned a distance of 80 mm, was 1 second. The test substance was therefore found to be ‘highly flammable’. The wetted zone applied did not stop the combustion of the test substance

Preliminary Screening Test

The flame of a gas burner ignited the test substance pile. The test substance melted and burned with an orange yellow flame and turned into a brown grey residue. Extensive black smoke was observed. The burning time over a distance of 200 mm, after the pile had burned a distance of 50 mm, was 2 seconds. Based on this result, the burning rate test was performed.

 

Burning rate test

The burning time over 100 mm, after the pile had burned a distance of 80 mm, was 1 second. The test substance was therefore found to be ‘highly flammable’.

 

The wetted zone applied did not stop the combustion of the test substance.

 

Conclusion

tert-Butyl(chloro)dimethylsilane was found to be flammable since the test substance burned with an orange yellow flame, over a distance of 100 mm in less than 45 seconds (i.e. > 2.2 mm/s). The wetted zone applied in the burning rate test did not stop the combustion.

Interpretation of results:

Category 1 (flammable solids) based on GHS criteria

Conclusions:

The test substance was determined to be flammable in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.

Reference 2

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 3

Endpoint:

pyrophoric solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied

Description of key information

Flammability: flammable solid (Category 1)

Key value for chemical safety assessment

Flammability:

flammable

Additional information

The test substance was determined to be flammable in a reliable study conducted according to EU test A.10/UN Test N.1 Test Method for Readily Combustible Solids, and in compliance with GLP.

tert-Butyl(chloro)dimethylsilane burned with an orange yellow flame, over a distance of 100 mm in less than 45 seconds (i.e. >2.2 mm/s). The wetted zone applied in the burning rate test did not stop the combustion. The result is considered to be reliable.

There is no indication on the basis of chemical 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

The substance is classified as a Flammable Solid, Category 1 (H228: Flammable Solid) on the basis of a burning rate >2.2 mm/s and the wetted zone did not stop propagation of the flame.