Neodymium trihydroxide

Oxidising properties

Administrative data

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 -31 August 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2016

Report date:

2016

Materials and methods

Test guideline

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 25.8-27.1°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)

Test material

Test material information

Constituent 1

Reference substance name:

Neodymium trihydroxide

EC Number:

240-514-4

EC Name:

Neodymium trihydroxide

Cas Number:

16469-17-3

Molecular formula:

H3NdO3

IUPAC Name:

neodymium trihydroxide

Test material form:

solid: particulate/powder

Details on test material:

- Name of test material (as cited in study report): neodymium trihydroxide
- Physical state: solid
- Appearance: clear blue powder (purple under UV light)

Study design

Contact with:

powdered cellulose

Results and discussion

Test results (Oxidising solids)

Test results (Oxidising solids) 1

Key result

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

other: mean time of reaction

Result:

221 s

Remarks on result:

other: Ignition

Test results (Oxidising solids) 2

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

other: mean time of reaction

Remarks on result:

mixture does not ignite and burn

Remarks:

Only black combustion around the wire observed.

Test results (Oxidising solids) 3

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

other: mean time of main reaction

Result:

166 s

Remarks on result:

other: Ignition

Test results (Oxidising solids) 4

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

other: mean time of main reaction

Result:

102 s

Remarks on result:

other: Ignition

Test results (Oxidising solids) 5

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

other: mean time of main reaction

Result:

5 s

Remarks on result:

other: Explosive ignition

Any other information on results incl. tables

The mean time of reaction of the test item / cellulose mixture in ratio 1:1 was 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. No reaction (apart from black combustion around the wire) was observed in the test item / cellulose mixture in ratio 4:1. 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.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

The oxidising properties of neodymium trihydroxide were investigated according to the UN O.1 test method in compliance with GLP. No reaction was recorded with the test item / cellulose mixture in ratio 4:1, and the mean time of reaction with the test item / cellulose mixture in ratio 1:1 was 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.