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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:
the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water
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
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18 Feb-15 Apr 2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.10 (Flammability (Solids))
Qualifier:
according to
Guideline:
other: United Nations (UN) Test N.1: “Test Method for Readily Combustible Solids”, 2009.
Deviations:
yes
Remarks:
No wetting zone was applied beyond the 100 mm timing zone during the burning rate test. It was technical not possible to prepare a wetting zone due to the high solubility of the compound.
GLP compliance:
yes (incl. certificate)
Remarks:
GLP Compliance Monitoring Program, Health Care Inspectorate, Ministry of Health, Welfare and Sport, Den Haag, The Netherlands
Test procedure:
burning time (test type not further specified)
Remarks:
or specified in description of method
Burning time:
38 s
Remarks on result:
other: burning rate 2.63 mm/s

Preliminary test

The flame of the gas burner did ignite the test substance pile. The test substance melted, burned with a blue yellow flame and turned into a brown residue. After the pile had burned a distance of 50 mm, the time of burning over a distance of 200 mm was measured to be 71 seconds (i.e. 2.8 mm/s).

Burning rate test

After the pile had burned a distance of 80 mm, the burning time over 100 mm was measured to be 38 seconds. The test was performed once, since it confirmed the preliminary screening test in which two positive results were observed.

Interpretation of results:
Category 1 (flammable solids) based on GHS criteria

Description of key information

flammable on ignition (EU A.10, UN N.1 without wetting zone application)
non-flammable on contact with water (based on structure and experience in handling and use, in accordance with guidelines EU A.12 and UN N.5)
non-pyrophoric (based on structure and experience in handling and use, in accordance with guidelines EU A.13 and UN N.2)

Key value for chemical safety assessment

Flammability:
flammable

Additional information

The influence of a wetted zone, as required according to the guideline UN.1, could not be investigated because of a high solubility of the test substance in water.

Justification for classification or non-classification

According to Regulation (EC) No 1272/2008 on classification, labelling and packaging (CLP) of substances and mixtures, the substance is considered to be a flammable solid, Category 1, and as R11 according to Directive 67/548/EEC. The Category 1 is assumed as the worst-case scenario, because the influence of the wetted zone cannot be investigated for technical reasons. Based on the chemical structure and experience in handling and use, pyrophoricity and flammability on contact with water are not expected.