Palladium dinitrate

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

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 The study is an unpublished guideline study that is reliable without restriction.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.

Reference 2

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.