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Reference
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)
Version / remarks:
2015
Deviations:
no
GLP compliance:
no
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Lot/batch No.of test material: 1387

Contact with:
other: dry fibrous cellulose
Duration of test (contact time):
180 s
Key result
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
> 180 s
Remarks on result:
other: All trails burned with smoldering and blackening around the coil. Appx. 70-80% of the original mixture remained tat the conclusion of testing.
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
> 180 s
Remarks on result:
other: All trials burned with smoldering and blackening around the coil. Appx. 70-80% of the original mixture remained at the conclusion of testing.

Criteria

The United Nations (2015) lists the following criteria for assessing the results of testing:

PG I:

Any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning time less than the mean burning time of a 3:2 mixture, by mass, of potassium bromate and cellulose.

PG II:

Any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning time equal to or less than the mean burning time of a 2:3 mixture (by mass) of potassium bromate; and Cellulose and the criteria for Packing Group I are not met.

PG III:

Any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning time equal to or less than the mean burning time of a 3:7 mixture (by mass) of potassium bromate; and Cellulose and the criteria for Packing Groups I and II are not met.

Not Div. 5.1:

Any substance which, in both the 4:1 and 1:1 sample-to-cellulose ratio (by mass) tested, does not ignite and burn, or exhibits mean burning times greater than that of a 3:7 mixture (by mass) I of potassium bromate and cellulose.

Note: The sample was passed through a 500 µm sieve and since all particles passed through the sample was tested as received.

Interpretation of results:
GHS criteria not met
Conclusions:
Under the conditions of this test, the test item did not appear to be a Division 5.1 Solid Oxidizer, as defined by UN/DOT criteria. This is because the sample, combined with cellulose in 1:1 and 4:1 ratios appeared to have an average burn time greater than the Packing Group III reference standards, when the UN Test of Oxidizing Solids Test O.1 was performed on the material.
Executive summary:

The determination of the oxidising properties of lithium carbonate was performed according to the UN Test of Oxidising Solids O.1. The test item was mixed with dry fibrous cellulose in mixing ratios of 1:1 and 4:1 by mass, of sample to cellulose. The burning characteristics of the mixtures were compared with the standard 3:7 mixture, by mass, of potassium bromate to cellulose (Packing Group III reference material). Under the conditions of this test, the test item did not appear to be a Division 5.1 Solid Oxidizer, as defined by UN/DOT criteria. This is because the sample, combined with cellulose in 1:1 and 4:1 ratios appeared to have an average burn time greater than the Packing Group III reference standards, when the UN Test of Oxidizing Solids Test O.1 was performed on the material.

Description of key information

Lithium carbonate has no oxidising properties based on the result of an test performed according to UN Test of Oxidising Solids O.1.

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

The determination of the oxidising properties of lithium carbonate was performed according to the UN Test of Oxidising Solids O.1. The test item was mixed with dry fibrous cellulose in mixing ratios of 1:1 and 4:1 by mass, of sample to cellulose. The burning characteristics of the mixtures were compared with the standard 3:7 mixture, by mass, of potassium bromate to cellulose (Packing Group III reference material). Under the conditions of this test, the test item did not appear to be a Division 5.1 Solid Oxidizer, as defined by UN/DOT criteria. This is because the sample, combined with cellulose in 1:1 and 4:1 ratios appeared to have an average burn time greater than the Packing Group III reference standards, when the UN Test of Oxidizing Solids Test O.1 was performed on the material.

Justification for classification or non-classification

Based on the results of the oxidising properties test, lithium carbonate is not classified according to Regulation (EC) No 1272/2008 (CLP) for oxidising properties.

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