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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

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)open allclose all
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
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
Sample tested:
reference: 3:7 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
125 s
Remarks on result:
other: Ignition
Sample tested:
reference: 2:3 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
79 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

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.