2-amino-6-methyl-1,2,4-triazolo[1,5-a]pyrimidin-5(1H)-one

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

11 September 2015 - 29 October 2015

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:

yes

Contact with:

powdered cellulose

Duration of test (contact time):

3 min

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

241 s

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

603 s

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

84 s

The burning times for the test substance and reference substance mixtures with cellulose are tabulated below.

Test No.	Burning Times (s)
	Test Substance		Reference
	4:1	1:1	3:7
1.	578	220	105
2.	580	205	65
3.	686	222	96
4.	541	292	70
5.	630	264	86
Mean	603	241	84

The 4:1 test substance mixtures melted and ignited and the cones collapsed into pooled liquid in the centre. Some of the material around the edges of the cones remained unburnt.

The 1:1 test substance mixtures fumed heavily before igniting and the fuming continued after the flames had extinguished. Again some of the material remained unburnt.

The mean burning times of the test substance/cellulose mixtures was determined to be greater than the mean burning time of the potassium bromate/cellulose mixtures used as standards.  In accordance with the criteria of UN Test O.1, the test substance is not classified as an oxidizing solid.

Interpretation of results:

GHS criteria not met

Conclusions:

The mean burning times of the test substance/cellulose mixtures were determined to be 603 seconds for a 4:1 mixture of test item:cellulose and 241 seconds for a 1:1 mixture of test item:cellulose. Both are greater than the mean burning time of the potassium bromate/cellulose mixtures used as standards. In accordance with the criteria of UN Test O.1, the test substance is not classified as an oxidizing solid.

Executive summary:

The study was performed to determine the oxidising properties of the test substance. The method employed was the UN Test O.1: “Test for Oxidizing Solids”.

 

The mean burning times of the test substance/cellulose mixtures were determined to be 603 seconds for a 4:1 mixture of test item:cellulose and 241 seconds for a 1:1 mixture of test item:cellulose. Both are greater than the mean burning time of the potassium bromate/cellulose mixtures used as standards. In accordance with the criteria of UN Test O.1, the test substance is not classified as an oxidizing solid.

Description of key information

The mean burning times of the test substance/cellulose mixtures were determined to be 603 seconds for a 4:1 mixture of test item:cellulose and 241 seconds for a 1:1 mixture of test item:cellulose. Both are greater than the mean burning time of the potassium bromate/cellulose mixtures used as standards. In accordance with the criteria of UN Test O.1, the test substance is not classified as an oxidizing solid.

Key value for chemical safety assessment

Oxidising properties:

non oxidising