Tris[oxalato(2-)]digadolinium

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

23 May 2016 - 30 August 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 > 150 µm. Test performed at 25.8-27.6°C instead of 20°C+/-5°C. These deviations were not considered to have affected the quality or the interpretation of the results obtained.

GLP compliance:

yes (incl. QA statement)

Contact with:

powdered cellulose

Key result

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Remarks on result:

other: No reaction up to 3 minutes. Only a combustion was observed next to the wire.

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Remarks on result:

other: No reaction up to 3 minutes. Only a combustion was observed next to the wire.

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

124 s

Remarks on result:

other: ignition

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

78 s

Remarks on result:

other: ignition

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

3 s

Remarks on result:

other: explosive ignition

The mean reaction times of test item and cellulose mixtures in ratios 4:1 and 1:1 were superior to 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 test item is not considered an oxidising solid.

Interpretation of results:

GHS criteria not met

Conclusions:

The oxidising properties of tris[oxalato(2-)]digadolinium were investigated according to the UN O.1 test method in compliance with GLP. Deviations from the guideline, which did not impact the quality or the results of the study, were observed. No reaction was recorded with the test item / cellulose mixtures in proportions 1:1 and 4:1. Therefore, the test item was not considered as an oxidising solid of Division 5.1 and thus was not assigned to any packing group and not classified as an oxidising solid under the CLP regulation.

Description of key information

Gadolinium oxalate 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). This study was assigned as key study.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

No reaction was recorded with the test item/cellulose mixtures in ratios 4:1 and 1:1. Therefore, the test can be considered as negative, and the substance is not considered to be an oxidising solid. Deviations from the guideline (particle size of potassium bromate < 150 µm instead of > 150 µm; test performed at 25.8-27.6°C instead of 20°C+/-5°C) were not considered to have affected the quality or the interpretation of the results obtained.

Justification for classification or non-classification

Based on the results obtained in the GLP study performed according to the UN O.1 guideline (Klimisch 1, Demangel, 2016), gadolinium oxalate was not considered as an oxidising solid of Division 5.1 and thus was not assigned to any packing group and not classified as an oxidising solid under the CLP regulation.