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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 JUN 2005 to 13 OCT 2005
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))
Version / remarks:
Cited as Directive 92/69/EEC, A.10
Deviations:
yes
Remarks:
Ignition source: use of a platinum wire heated by electrical power instead a direct flame. This modification has no effect on the conclusion.
GLP compliance:
yes (incl. QA statement)
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. No further testing was required.

Interpretation of results:
GHS criteria not met
Conclusions:
The test item is not highly flammable under the conditions of test.
Executive summary:

The determination of the flammability of cerium trinitrate was performed using a powder train about 250 mm long, according to EU Method A10.

The test item did not burn. No further testing was required. It is not highly flammable under the conditions of 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

Following a GLP study in accordance with EC test method A.10, cerium trinitrate is concluded to be not highly flammable (Cerutti, 2005). From day to day handling of the substance, cerium trinitrate 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 and an additional Grewer oven test, in which the temperature of the test item did not deviate from that in the oven up to at least 400°C (Cerutti, 2005). 

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 trinitrate 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 trinitrate

has pyrophoric properties.

Flammability in contact with water.

Under conditions where cerium trinitrate is in contact with water (which includes the production of cerium trinitrate 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 trinitrate is flammable in contact with water.

Flammability.

From a flammability test (EC A.10) cerium trinitrate is concluded to be not highly flammable (Cerutti, 2005). This results in an absence of classification under the CLP regulation.

Self-heating.

In an EC A.16 test and an additional Grewer oven test, the temperature of the test item did not deviate from the oven temperature up to at least 400°C (Cerutti, 2005). Based on these results, it can be safely concluded that cerium trinitrate is not self-heating.