Lutetium oxide

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 August 2016 - 21 October 2016

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)

Deviations:

yes

Remarks:

Particle size of potassium bromate < 150 µm (instead of higher). Test performed at 25.8-27.1°C instead of 20°C +/- 5°C. These deviations were not considered to have affected the quality or the interpretation of the results.

GLP compliance:

yes (incl. QA statement)

Contact with:

powdered cellulose

Key result

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

228 s

Remarks on result:

other: Ignition

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

265 s

Remarks on result:

other: Ignition

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

166 s

Remarks on result:

other: Ignition

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

102 s

Remarks on result:

other: Ignition

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

5 s

Remarks on result:

other: Explosive ignition

The mean times of reaction with the test item / cellulose mixture in ratios 4:1 and 1:1 were higher than the mean times of reaction measured during this study for the potassium bromate / cellulose mixtures in ratios 3:7, 2:3 and 3:2. Therefore, the test can be considered as negative, and the substance is not considered as an oxidising solid of Division 5.1, is not assigned to any packing group, and is not classified as an oxidising solid under the CLP regulation.

Interpretation of results:

GHS criteria not met

Conclusions:

The oxidising properties of lutetium oxide were investigated according to the UN O.1 test method in compliance with GLP. The mean times of reaction with the test item / cellulose mixtures in ratios 4:1 and 1:1 were higher than the mean times of reaction measured during this study for the potassium bromate / cellulose mixtures in ratios 3:7, 2:3 and 3:2. Therefore, the test can be considered as negative, and the substance is not considered as an oxidising solid of Division 5.1, is not assigned to any packing group, and is not classified as an oxidising solid under the CLP regulation. The deviations from the guideline observed during the study are not considered to have affected the quality or the interpretation of the results obtained, hence, the results of the study are considered reliable without restrictions.

Description of key information

Lutetium oxide is not classified as an oxidising agent based on a GLP study performed according to the UN O.1 test guideline (Klimisch 1, Demangel, 2016).

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

The mean reaction times of test item and cellulose mixtures in ratios 4:1 and 1:1 were higher than the mean reaction times measured during this study for the potassium bromate and cellulose mixtures in ratios 3:7, 2:3 and 3:2. Therefore, the test can be considered as negative, and the substance is not considered an oxidising solid.

Justification for classification or non-classification

The mean reaction times of test item and cellulose mixtures in ratios 4:1 and 1:1 were higher than the mean reaction times measured for the potassium bromate and cellulose mixtures in ratios 3:7, 2:3 and 3:2 in the GLP study performed according to the UN O.1 guideline (Klimisch 1, Demangel, 2017b). Therefore, lutetium oxide was not considered as an oxidising solid of Division 5.1 and was thus not assigned to any packing group and not classified as an oxidising solid under the CLP regulation.