Registration Dossier

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-06-21 to 2016-06-21
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
no
GLP compliance:
no
Key result
Test procedure:
burning rate test: preliminary screening test
Burning time:
0 s

Since the test substance did not ignite it should not be considered as highly flammable and no further testing is required.

The test substance chromium diboride (CrB2) is non-combustible.

Interpretation of results:
not classified based on GHS criteria
Conclusions:
In conclusion, in a preliminary screening test, no ignition of the test substance chromium diboride occurred in 5 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, chromium diboride is considered as not highly flammable.
Executive summary:

The flammability of chromium diboride was 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 for five minutes. There was no ignition observed. Since the test substance did not ignite it should not be considered as highly flammable and no further testing is required.

The test substance chromium diboride (CrB2) is non-combustible.

Description of key information

The flammability of Chromium diboride was tested according to 440/2008/EC Method A.10. Since no ignition occurred within 5 minutes no further testing was required and the test substance is considered as not highly flammable.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

The flammability of Chromium diboride was 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 for five minutes. There was no ignition observed. Since the test substance did not ignite it should not be considered as highly flammable and no further testing is required.

The test substance Chromium diboride (CrB2) is non-combustible.

Justification for classification or non-classification

Since the test substance does not ignite, Chromium diboride is not classified as flammable solid in accordance with UN GHS Rev. 6 criteria.