Registration Dossier

Administrative data

Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
05 October 2017 - 06 February 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test O.3 (Gravimetric test for oxidizing solids)
Deviations:
yes
Remarks:
Reference item purity was 79.1% instead of 75% +/- 0.5%, RSD > 10% for test item:cellulose mixture 4:1, R2 of mass curve (between 20-80% mass loss) of assay 1 and 3 for test item:cellulose mixture 4:1 just < 0.95. Deviations had no effect on outcome.
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
ytterbia stabilised yttrium disilicate
Molecular formula:
Yb2-xYxSi2O7
IUPAC Name:
ytterbia stabilised yttrium disilicate
Test material form:
solid: particulate/powder
Details on test material:
Name: ytterbium doped yttrium disilicate
Physical state: solid
Appearance: white 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:
burning rate
Result:
0.037 g/s
Remarks on result:
other: Ignition and combustion were observed
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
burning rate
Result:
0.036 g/s
Remarks on result:
other: Ignition and combustion were observed
Sample tested:
reference: 1:2 mixture calcium peroxide + cellulose
Parameter:
burning rate
Result:
0.242 g/s
Remarks on result:
other: Ignition was observed

Any other information on results incl. tables

The mean burning rates of reaction with the test item / cellulose mixture in proportions 4:1 or 1:1 were lower than the mean burning rate of reaction with the reference item / cellulose mixture in proportion 1:2.

Therefore, the test item was not considered to be an oxidising solid following GHS terminology and was not classified in Division 5.1 and thus was not assigned to any packing group following the “UN Recommendations on the Transport of Dangerous Goods - Manual of Tests and Criteria”.

Applicant's summary and conclusion

Conclusions:
The oxidising properties of ytterbium doped yttrium disilicate were investigated according to the UN O.3 test method in compliance with GLP. The mean burning rates of reaction with the test item / cellulose mixtures in ratios 4:1 and 1:1 were lower than the mean burning rate of reaction with the reference item / cellulose mixture in proportion 1:2. Therefore, the test item was not considered to be 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.