Calcium oxide

Flammability

Link to relevant study record(s)

Reference

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2010-03-30 to 2010-03-31

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study reliable without restrictions

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

Version / remarks:

, 2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

signed 2009-11-26

Test procedure:

burning time (test type not further specified)

Remarks:

or specified in description of method (migrated information)

Burning time:

0 s

Remarks on result:

other: Preliminary screening test

Preliminary screening test: The pile failed to ignite during the two minutes that the Bunsen flame was applied. The result of the preliminary screening test obviated the need to perform the main test.

Moisture content:

	Determination A	Determination B
a ) Mass of loss bottle (g)	20.4290	19.6282
b) Mass of loss bottle and test material	21.4257	20.6282
c) Mass of loss bottle and test material after drying (g)	21.4324	20.6354
Mass gain (% w/w)	0.672	0.720
Mean mass gain (% w/w)	0.696

For the moisture content determination, the test material increased in mass after drying at 105 °C. this increase in mass is probably due to the absorption of carbon dioxide from the atmosphere during the apporximately 20 hour period in the oven. This increase in mass suggests the moisture content of the test item was not significant.

Interpretation of results:

non flammable

Remarks:

Migrated information

Conclusions:

The test material has been determined to be not highly flammable as it failed to ignite in the preliminary screening test.

Executive summary:

The procedure for the preliminary screening test specified in Method A10 Flammability (Solids) of Commission Regulation (EC) No 440/2008 of 30 May 2008, is the same as the procedure for the preliminary screening test specified in Test N.1 (test method for readily combustible solids) of the United Nations Recommendations on the Transport of Dangerous Goods manual of tests and criteria, fourth revised edition 2003. Test N.1 states that, if the substance does not ignite within the 2 minutes test period, then the substance should not be classified as a flammable solid and thus is not a readily combustible solid of Division 4.1.

Description of key information

Test result available for flammability (EU A.10 method).

Key value for chemical safety assessment

Flammability:

not classified

Additional information

Calcium oxide is not flammable based on the results of a preliminary screening test performed according to EU Method A.10 where it failed to ignite within the 2 -minute test period. A similar result was obtained for calcium carbonate in a preliminary screening test performed according to Method N.1 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 4th revised edition, 2003. Therefore it may be concluded that grades of calcium oxide containing up to 35% calcium carbonate will also be not flammable.

Justification for classification or non-classification

Calcium oxide is not classified according to test result for flammability (EU A.10 method).Similarly, calcium carbonate is not flammable based on the results of a preliminary screening test performed according to Method N.1 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 4th revised edition, 2003. Therefore it may be concluded that grades of calcium oxide containing up to 35% calcium carbonate will also be not flammable.