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Physical & Chemical properties

Flammability

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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:
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
other:
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
6 Nov 2017 to 25 Mar 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
no
GLP compliance:
yes
Test procedure:
burning rate test: preliminary screening test
Burning time:
> 4 min
Remarks on result:
substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period

Results

The flame of the gas burner did ignite the test item pile. The test item expanded, glowed, burned with a yellow flame and turned into a black residue. Grey smoke was observed. After removal of the ignition source, the flame extinguished after 1 second and no propagation of combustion was observed.

 

Conclusion

The preliminary screening test was performed for the determination of the flammability of CD-3 / CAS 25646-71-3. No propagation of combustion of the test item along 200 mm length of the pile within 4 minutes was observed.  According to the guidelines, performance of the burning rate test is not required. Based on the results obtained, the test item is considered ‘not highly flammable’.

Endpoint:
self-heating substances / mixtures
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 completely molten at 160°C

Description of key information

not flammable on ignition

not pyrophoric

not flammable on contact with water

not self-heating

Key value for chemical safety assessment

Flammability:
not classified

Additional information

The substance is not classified as a readily combustible solid according to the definition in the UN-class 4.1 (UN Test method N.1). Based on chemical structure and experience in handling and use, the substance is not expected to exhibit pyrophoric properties, or emit flammable gases upon contact with water. Also, substance is not self-heating, since melting point is < 160 °C. A liquid shows no self-heating behavior if it is not absorbed on a large surface.

Justification for classification or non-classification

The available data on flammability of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are therefore conclusive but not sufficient for classification:

The substance is not classified as a readily combustible solid according to the definition in the UN-class 4.1 (UN Test method N.1). Based on chemical structure and experience in handling and use, the substance is not expected to exhibit pyrophoric properties, or emit flammable gases upon contact with water. Also, substance is not self-heating, since melting point is < 160 °C. A liquid shows no self-heating behavior if it is not absorbed on a large surface.