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Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-0-27 to 2016-06-27
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
no
GLP compliance:
no
Test procedure:
burning rate test: preliminary screening test
Burning time:
450 s

Since combustion propagated along 200 mm in more than 4 minutes the test substance has not to be considered as highly flammable and no further testing was required.

The test substance zirconium carbide (ZrC) is not highly flammable.

Interpretation of results:
not classified based on GHS criteria
Conclusions:
In conclusion, in a preliminary screening test, combustion propagated along 200 mm in more than 4 minutes. According to the guideline, performance of a main study for the determination of the burning rate of the test substance was not required. Therefore, zirconium carbide is considered as not highly flammable.
Executive summary:

The flammability of zirconium carbide tested according to Regulation 440/2008/EC Method A.10. The test substance was formed into a powder train about 250 mm long by 20 mm wide by 10 mm high on a fireclay plate. A hot flame from a gas burner was applied to one end of the powder train until ignition. The combustion propagated along 200 mm in more than 4 minutes. According to the guideline, performance of a main study for the determination of the burning rate of the test substance was not required.

The test substance zirconium carbide (ZrC) is not highly flammable.

Description of key information

The flammability of zirconium carbide was tested according to 440/2008/EC Method A.10. Since combustion propagated along 200 mm in more than 4 minutes no further testing was required and the substance was considered as not highly flammable.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

The flammability of zirconium carbide tested according to Regulation 440/2008/EC Method A.10. The test substance was formed into a powder train about 250 mm long by 20 mm wide by 10 mm high on a fireclay plate. A hot flame from a gas burner was applied to one end of the powder train until ignition. The combustion propagated along 200 mm in more than 4 minutes. According to the guideline, performance of a main study for the determination of the burning rate of the test substance was not required.

The test substance zirconium carbide (ZrC) is not highly flammable.

Justification for classification or non-classification

Since combustion propagated along 200 mm in more than 4 minutes, zirconium carbide is not classified as flammable solid in accordance with UN GHS Rev. 6 criteria.

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