Disilver oxide

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising solids

Remarks:

powder

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2009-07-14 to 2009-07-22

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Part 34.4.1 (Test O.1)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Contact with:

powdered cellulose

Duration of test (contact time):

<= 192 s

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

21 s

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

66 s

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

128 s

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

182 s

Remarks on result:

other: Mixture burns completely from the bottom to the top with a yellow flame.

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

5 s

Remarks on result:

other: Mixture burns violently with large flame

Sample tested:

other: not specified (migrated information) mean burning time

Parameter:

other: mean burning time

Result:

5 s

Remarks on result:

other: The mean burning time of the mixture of the test item/cellulose 4:1. Mixture burns violently with large flame.

Due to the fact that the mixture of the test item with cellulose in the ratio 4:1 has a lower mean burning time compared to the reference mixture in the ratio 3:7, it is concluded that the test item has oxidizing properties.

Due to the fact that the mean burning time of the mixture of the test item with cellulose in the ratio of 4:1 is also less than the mean burning time of the 3:2 mixture, by mass, potassium bromate and cellulose the test item has to be classified to Packing group I.

Interpretation of results:

Category 1 (strong oxidising solids) based on GHS criteria

Conclusions:

The test item disilver oxide has oxidizing properties and has to be classified to Packing group I in the sense of the Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Part 34.4.1 (Test O.1).
The test item disilver oxide has oxidizing properties and has to be clasified in Category 1 in accordance with Regulation (EC) No. 1272/2008 on the clasification, labelling and packaging of substnces and mixtures ("CLP Regulation"). The according hazard statement is "H271: May cause fire or explosion; strong oxidiser."

Reference 2

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

February 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: UN Recommendations on the Transport of Dangerous Goods, Tests and Criteria, fifth revised edition, 2009 (UN-Test O.1).

Deviations:

no

GLP compliance:

no

Contact with:

powdered cellulose

Duration of test (contact time):

ca. 3 min

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

171.76 s

Remarks on result:

other: Results for batch PMC3. Carbonisation with formation of smoke, burn-off with yellow flame or carbonisation with formation of smoke, without flames

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

6.88 s

Remarks on result:

other: Results from batch PMC3. Violet burn-off with yellow flames.

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

164.28 s

Remarks on result:

other: Results from batch PMC4. Burn-off with yellow flames or carbonisation with formation of smoke, burn off with yellow flames.

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

6 s

Remarks on result:

other: results from PMC4. Violet burn-off with yellow flames

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

41.72 s

Remarks on result:

other: violet burn-off with yellow flames

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

13.24 s

Remarks on result:

other: violet burn-off

The substance "Disilver oxide - Batch PMC3" fulfils the criteria for Packing Group I, because the mean burning time of 6.88 s of the 4:1 sample-to-cellulose ratio (by mass) is less than the mean burning time of 13.24 s of the 3:2 mixture (by mass) of potassium bromate and cellulose.

The substance "Disilver oxide - Batch PMC4" fulfils the criteria for Packing Group I, because the mean burning time of 6.0 s of the 4:1 sample-to-cellulose ratio (by mass) is less than the mean burning time of 13.24 s of the 3:2 mixture (by mass) of potassium bromate and cellulose.

Interpretation of results:

Category 1 (strong oxidising solids) based on GHS criteria

Conclusions:

On the basis of the test results and according to the criteria specified in the UN Recommendations on the Transport of Dangerous Goods the substance "Disilver oxide - Batch PMC 3" and "Disilver oxide - Batch PMC 4" have to be classified as class 5.1, UN- Number 1479, Packaging Group I if the substances will have no subsidiary risk. On the basis of the test results and according to the criteria specified in the GHS the substances "Disilver oxide - Batch PMC 3" and "Disilver oxide - Batch PMC 4" are oxidising solids of Category 1.

Description of key information

Two representative sample of disilver oxide powders (batches PMC 3 and PMC 4)  were subjected to a test according to the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Part 34.4.1 (Test O.1). The test on the sample PMC 3 is available from two different laboratories. Based on these results, both samples of disilver oxide require classification according to the UN Recommendations on the Transport of Dangerous Goods (Class 5.1, Packaging Group I), as well as according to GHS / CLP as oxidising solids category 1.

Key value for chemical safety assessment

Oxidising properties:

oxidising

Justification for classification or non-classification

Two representative sample of disilver oxide powders (batches PMC 3 and PMC 4) were subjected to a test according to the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Part 34.4.1 (Test O.1). The test on the sample PMC 3 is available from two different laboratories. Based on these results, both samples of disilver oxide require classification according to the UN Recommendations on the Transport of Dangerous Goods (Class 5.1, Packaging Group I), as well as according to GHS / CLP as oxidising solids category 1.