Trilithium orthophosphate

Oxidising properties

Link to relevant study record(s)

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 No.of test material: 5401

Contact with:

other: dry fibrous cellulose

Key result

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

166 s

Remarks on result:

other: All trials burned with orange flames with a maximum height of approximately 3-4". Approximately 5-10% of the original mixture original mixture remained at the conclusion remained at the conclusion of testing.

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 1

Result:

169 s

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 2

Result:

162 s

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 3

Result:

175 s

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 4

Result:

160 s

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 5

Result:

164 s

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

155.8 s

Remarks on result:

other: All trials burned with blackening of the conical pile with smoke. Approximately 15-20% of the original mixture remained at the conclusion of testing.

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 1

Result:

160 s

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 2

Result:

149 s

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 3

Result:

157 s

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 4

Result:

152 s

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

other: Burn Time, Trial 5

Result:

161 s

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Remarks:

Packing Group III

Parameter:

mean burning time

Result:

71.6 s

Remarks on result:

other: All trials burned with an orange to purple (at base) flame and a maximum flame height of 12"-16"producing grey smoke. Approximately 0-5 % 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 phosphate 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 phosphate 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:

non oxidising

Additional information

The determination of the oxidising properties of lithium phosphate 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 phosphate is not classified according to Regulation (EC) No 1272/2008 (CLP) for oxidising properties.