Palladium monoxide

Oxidising properties

Link to relevant study record(s)

Reference

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

Specific details on test material used for the study:

d(0.5) = 131 µm
98% of the particles <500 µm

Contact with:

powdered cellulose

Duration of test (contact time):

ca. 130 s

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

120 s

Remarks on result:

other: Burn-off without flames and formation of smoke

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

11 s

Remarks on result:

other: Burn-off without flames and formation of smoke

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

12 s

Remarks on result:

other: Based on the fast burning times of the sample-to-cellulose mixture (4: 1) no testing of other reference mixtures was necessary.

Table 1: Burning times of 1: 1 and 4:1 sample-to-cellulose mixtures in the UN-Test O.1 with palladium monoxide.

Ratio of sample: cellulose (by mass)	Burning time [s]					Mean burning time [s]
1:1	109	128	125	-*	-*	t1: 120
	Burn-off without flames and formation of smoke
4:1	11	11	11	-*	-*	t2: 11
	Burn-off without flames and formation of smoke

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

Table 2: Burning times of reference substance

Ratio of potassium bromate: cellulose (by mass)	Burning time [s]					Mean burning time [s]
3:2*	13	12	13	12	12	R3: 12

*Based on the fast burning times of the sample-to-cellulose mixture (4: 1) no testing of other reference mixtures was necessary.

Interpretation of results:

Category 1 (strong oxidising solids) based on GHS criteria

Conclusions:

Based on the test results Palladium monoxide fulfils the criteria
1/ of the Hazard Class "Oxidizing Solids", category 1 of the Regulation (EC) No 1272/2008 (CLP) and GHS,
2/ of Class 5.1 "Oxidizing Substances", packing group I of the TDG.

Executive summary:

The study to determine oxidising properties of palladium monoxide was performed according to UN-Test O.1. The study is an unpublished guideline study that is reliable without restriction.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) (11 s) was less than the mean burning time R3 (12 s) of the 3:2 mixture (by mass) of potassium bromate to cellulose.

Based on the test results, palladium monoxide fulfils the criteria of the Hazard Class "Oxidizing Solids", category 1 of the Regulation (EC) No 1272/2008 (CLP) and GHS and the criteria of Class 5.1 "Oxidizing Substances", packing group I of the TDG (transport classification based on the United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations, nineteenth revised edition 2015).

Description of key information

Palladium monoxide is shown to fulfil the criteria of the Hazard Class "Oxidizing Solids", category 1 of the Regulation (EC) No 1272/2008 (CLP) and GHS and the criteria of Class 5.1 "Oxidizing Substances", packing group I of the TDG (transport classification based on the United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations, nineteenth revised edition 2015).

Key value for chemical safety assessment

Oxidising properties:

oxidising

Justification for classification or non-classification

Using UN-Test O.1, palladium monoxide is shown to fulfil the criteria of the Hazard Class "Oxidizing Solids", category 1 of the Regulation (EC) No 1272/2008 (CLP) and GHS and the criteria of Class 5.1 "Oxidizing Substances", packing group I of the TDG (transport classification based on the United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations, nineteenth revised edition 2015).