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Diss Factsheets

Physical & Chemical properties

Flammability

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Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27 Jun 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.10 (Flammability (Solids))
Principles of method if other than guideline:
Standard Operating Procedure E402 Flammability (Solids) (A10)
GLP compliance:
no
Test procedure:
burning rate test: preliminary screening test
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

A screening test was carried out first with a small amount of sample approx. 2 cm² across to determine how the sample would react when exposed to a flame. This was also carried out to determine if any additional specialist safety measurements were needed when carrying out the initial test. It was found that no additional specialist safety requirements were needed.

A flame was directed at the sample constantly for two minutes using a blowlamp at approx. 1000 °C. It showed a low flammability as a small flame developed, not higher than 4 cm. The part of the sample that was closest to the flame carbonised and the flame continued on through the line of sample for 13.42 minutes before extinguishing itself. Although this was observed, the

material did not meet the requirements of the test, therefore the material could not be considered to be flammable as the material did not burn all the way through in the time of 4 minutes.

Interpretation of results:
GHS criteria not met
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:
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:
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

non-flammable on ignition (EU A.10)

non-pyrohoric

not releasing flammable gases on contact with water

not self-heating

Key value for chemical safety assessment

Flammability:
not classified

Additional information

The flammability (solids) test according to EU A.10 yielded a negative result.

Based on structure and experience in handling and use, pyrophoric properties and flammability on contact with water are excluded.

Based on the fact that the substance is completely molten at 160 °C (melting point ca. 130 °C), the substance is not self-heating.

Justification for classification or non-classification

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

Based on the outcome of the EU A.10 test, the substance is non-flammable on ignition.

Based on structure and experience in handling and use, pyrophoric properties and flammability on contact with water are not expected.

Based on the fact that the substance is completely molten at 160 °C (melting point ca. 130 °C), the substance is not self-heating.