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Physical & Chemical properties

Flammability

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Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 10 October 2008 to 21 November 2008
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
yes
Remarks:
The ignition source is a platinum wire heated by electrical power (current 30A, about 1000°C) instead of a direct flame as proposed in the guideline (EC) N°440/2008 A10. This modification does not have any effect on the conclusion.
GLP compliance:
yes (incl. certificate)
Key result
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

The test item did not burn. It melts in contact with the ignition source. No futher testing was required.

Interpretation of results:
GHS criteria not met
Conclusions:
Cerium ammonium nitrate is not "highly flammable" under the conditions of the test.
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:
self-heating substances / mixtures
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:

Description of key information

Cerium ammonium nitrate is concluded not to be flammable following a GLP study in accordance with EC test method A.10 (Vibert, 2008). From day to day handling of the substance, cerium ammonium nitrate is concluded not to have pyrophoric properties nor to be flammable in contact with water. Finally, the substance is not considered self-heating, based on the observations of a GLP study performed according to EC test method A.16, in which the temperature of the test item did not deviate from that in the oven up to at least 400°C (Vibert, 2008). 

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Justification for classification or non-classification

Pyrophoricity: In the daily use and handling of cerium ammonium nitrate during which continuous exposure to air can occur, no spontaneous ignition is observed. The absence of structural alerts furthermore confirms that it is highly unlikely that cerium ammonium nitrate has pyrophoric properties.

Flammability in contact with water: Under conditions where cerium ammonium nitrate is in contact with water (which includes the production of cerium ammonium nitrate in aqueous solutions as applied by some manufacturers) no ignition and/or liberation of flammable gases is observed. The absence of structural alerts furthermore confirms that it is highly unlikely that cerium ammonium nitrate is flammable in contact with water.

Flammability: From a flammability test (EC A.10) cerium ammonium nitrate is concluded to be not highly flammable (Vibert, 2008). This results in an absence of classification under the CLP regulation.

Self-heating: In an EC A.16 test, the temperature of the test item did not deviate from the oven temperature up to at least 400°C (Vibert, 2008). Based on these results, it can be safely concluded that cerium ammonium nitrate is not self-heating.