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Oxidising properties

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Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
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:
no
GLP compliance:
no
Contact with:
powdered cellulose
Duration of test (contact time):
25 s
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
23.7 s
Remarks on result:
other: Rapid burn-off with flames.
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
4.3 s
Remarks on result:
other: Rapid burn-off with flames.

Table 1: Burning times of 1: 1 and 4:1 sample-to-cellulose mixtures in the UN-Test O.1 with Palladium (II) nitrate hydrate.

Ratio of sample: cellulose (by mass)

Burning time [s]

Mean burning time [s]

1:1

22

25

24

-*

-*

23.7

Rapid burn-off with flames

4:1

5

4

4

-*

-*

4.3

Rapid burn-off with flames

Table 2: Burning times of reference substance

Ratio of potassium bromate: cellulose (by mass)

Burning time [s]

Mean burning time [s]

3:7

113

-*

-*

-*

-*

~113.0

Burn-off with flames

2:3

53

-*

-*

-*

-*

~53.0

Burn-off with flames

3:2

10

14

18

14

13

13.8

Rapid burn-off with flames

* Based on the clear test results further testing was not necessary.

 

Interpretation of results:
Category 1 (strong oxidising solids) based on GHS criteria
Conclusions:
Based on the test results, Palladium (II) nitrate hydrate fulfils the criteria of the Hazard Class “Oxidizing Solids”, category 1 of the Regulation (EC) No 1272/2008 (CLP) and GHS.
Executive summary:

The study to determine oxidising properties of Palladium (II) nitrate hydrate was performed according to UN-Test O.1 (Michael-Schulz 2016). The study is an unpublished guideline study that is reliable without restriction.

The mean burning time of the 4:1 sample-to-cellulose mixtures (by mass) was lower than the mean burning time R3 (13,8 s) of the 3:2 mixture (by mass) of potassium bromate to cellulose. Based on the test results, Palladium (II) nitrate hydrate fulfils the criteria of Class 5.1 “Oxidizing Substances”, packing group I of the TDG and of the Hazard Class “Oxidizing Solids”, category 1 of the Regulation (EC) No 1272/2008 (CLP) and GHS.

Endpoint:
oxidising liquids
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
22/06/2007
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP, guideline, available as an unpublished report, minor restrictions in reporting but otherwise adequate for assessment
Qualifier:
according to guideline
Guideline:
EU Method A.21 (Oxidising Properties (Liquids))
Deviations:
not specified
Principles of method if other than guideline:
oxidising properties were determined by comparing the pressure rise time, between 690 and 2070kPa, for mixtures for test material/cellulose with reference mixtures of nitric acid/cellulose.
GLP compliance:
yes (incl. QA statement)
Contact with:
powdered cellulose
Duration of test (contact time):
10 min
Sample tested:
test mixture 1:1
Parameter:
mean pressure rise time
Result:
6.11 s
Sample tested:
reference mixture with 65% nitric acid + cellulose (1:1 ratio)
Parameter:
mean pressure rise time
Result:
3.534 s
Interpretation of results:
GHS criteria not met
Conclusions:
No oxidising properties as the mean pressure rise time for the test material/cellulose mixture was slower than the mean pressure rise time for the nitric acid/cellulose mixtures.
Executive summary:

This information is from a GLP compliant, guideline study and is considered suitable for assessment. Palladium dinitrate had no oxidising properties as the mean pressure rise time for the test material/cellulose mixture was slower than the mean pressure rise time for the nitric acid/cellulose mixtures.

Description of key information

Palladium (II) nitrate hydrate in solid form has oxidising properties as the mean burning time of the 4:1 sample-to-cellulose mixture (by mass) was lower than the mean burning time of the 3:2 mixture of the reference substance to cellulose. Palladium (II) nitrate hydrate is classified as Category 1 Oxidising Solid according to the Regulation (EC) No 1272/2008 (CLP) and GHS.

Key value for chemical safety assessment

Oxidising properties:
oxidising

Additional information

The study to determine oxidising properties of the solid form of Palladium (II) nitrate hydrate was performed according to UN-Test O.1 (Michael-Schulz 2016). The study is an unpublished guideline study that is reliable without restriction.

The mean burning time of the 4:1 sample-to-cellulose mixtures (by mass) was lower than the mean burning time R3 (13,8 s) of the 3:2 mixture (by mass) of potassium bromate to cellulose. Based on the test results, Palladium (II) nitrate hydrate fulfils the criteria of Class 5.1 “Oxidizing Substances”, packing group I of the TDG and of the Hazard Class “Oxidizing Solids”, category 1 of the Regulation (EC) No 1272/2008 (CLP) and GHS.

Supporting data is available for an aqueous solution of palladium dinitrate. Tremain (2007) is a GLP compliant study following EU method A.21 and is considered suitable for use as a supporting study for assessment of this endpoint for a solution of palladium dinitrate. Palladium dinitrate solution had no oxidising properties as the mean pressure rise time for the test material/cellulose mixture was slower than the mean pressure rise time for the nitric acid/cellulose mixtures.

Justification for classification or non-classification

Based on test results from a reliable study following UN method O.1 (Michael-Schulz 2016) Palladium (II) nitrate hydrate fulfils the criteria of Class 5.1 “Oxidizing Substances”, packing group I of the TDG and of the Hazard Class “Oxidizing Solids”, category 1 of the Regulation (EC) No 1272/2008 (CLP) and GHS.