Ytterbium (III) 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:

11 July 2017 - 22 August 2017

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:

(1) Particle size of potassium bromate < 150 µm instead of > 150 µm; (2) test performed at 27.0°C-29.3°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:

418 s

Remarks on result:

other: Ignition

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

312 s

Remarks on result:

other: Ignition

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

111 s

Remarks on result:

other: Ignition

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

72 s

Remarks on result:

other: Ignition

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

4 s

Remarks on result:

other: Explosive ignition

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.

Interpretation of results:

GHS criteria not met

Conclusions:

The oxidising properties of diytterbium trioxide 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 deviation from the guideline observed during the study is not considered to have affected the quality or the interpretation of the results obtained.

Description of key information

Diytterbium trioxide is not classified as an oxidising agent based on a GLP study performed according to the UN O.1 test guideline (Klimisch 1, Demangel, 2017b).

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

In the study of Demangel (2017b) performed according to the UN O.1 test guideline, the observed deviation from the guideline (particle size of potassium bromate) is 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.

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, diytterbium trioxide 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.