Praseodymium trichloride

Oxidising properties

Administrative data

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 June 2017 - 09 November 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

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 26.8°C-27.6°C instead of 20°C +/- 5°C. Atmospheric pressure not recorded. These deviations did not affect the quality or interpretation of the results.

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

trichloropraseodymium; heptahydrate

Cas Number:

10025-90-8

Molecular formula:

PrCl3.7H2O

IUPAC Name:

trichloropraseodymium; heptahydrate

Test material form:

solid: particulate/powder

Details on test material:

- Name of the test material (as in the report): praseodymium trichloride heptahydrate
- Physical state: solid
- Appearance: green crystalline powder
- Further information on test material confidential.

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:

mean burning time

Result:

> 180 s

Remarks on result:

other: Combustion around the wire

Test results (Oxidising solids) 2

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

> 180 s

Remarks on result:

other: Combustion around the wire

Test results (Oxidising solids) 3

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

125 s

Remarks on result:

other: Ignition

Test results (Oxidising solids) 4

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

79 s

Remarks on result:

other: Ignition

Test results (Oxidising solids) 5

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

4 s

Remarks on result:

other: Explosive ignition

Any other information on results incl. tables

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.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

The oxidising properties of praseodymium trichloride (heptahydrate form) 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 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.