1-(3-chloropyridin-2-yl)-N-[4-cyano-2-methyl-6-(methylcarbamoyl)phenyl]-3-{[5-(trifluoromethyl)-2H-tetrazol-2-yl]methyl}-1H-pyrazole-5-carboxamide

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16 to 20 November 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess, Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Contact with:

powdered cellulose

Sample tested:

test mixture as specified

Remarks:

2:1 test item / cellulose

Parameter:

preliminary test

Result:

>= 4 - <= 18 s

Remarks on result:

other: The flames extinguished after the reported times

Sample tested:

reference mixture as specified

Remarks:

2:1 barium nitrate / cellulose

Parameter:

preliminary test

Result:

>= 47 - <= 59 s

Key result

Sample tested:

reference mixture as specified

Remarks:

60:40 barium nitrate/cellulose

Parameter:

maximum burning rate

Result:

1.68 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

10:90 test item / cellulose

Parameter:

maximum burning rate

Result:

1.05 mm/s

Preliminary test

Three test mixtures with the test item and cellulose 2:1 did not burn down completely. The mixtures burned for 4 s, 20 s and 18 s. Afterwards the flames extinguished.

Three test mixtures with barium nitrate and cellulose 2:1 burned down completely in 59 s, 47 s and 56 s.

Due to the results of the preliminary test the main test had to be performed.

 

Main test

Four tests were performed for the reference mixture (barium nitrate and cellulose) with 50, 55, 60 and 70 wt. % of oxidizer (barium nitrate). The highest burning rate of 1.68 mm/s was found for the mixture with 60 wt. % of oxidizer.

Mixtures of the test item with cellulose were prepared in different percentages. The results of the test of the different mixtures are reported in the table below.

 

Burning times and rates of test item mixtures

Test item [%]	Burning time over 200 mm [s]	Burning rate [mm/s]
10	203	0.99
20	228	0.88
30	245	0.82
40	249	0.80
50	Flame extinguished in the initial burning phase.	-
70	Flame extinguished in the initial burning phase.	-
90	The mixture could not be ignited. The mixture melted.	-

 

The maximum burning rate of the mixtures of the test item with cellulose was lower than the maximum burning rate of the reference mixture. Five more tests were performed with the three mixtures with the highest burning rates to verify these values. Results are reported in the table below (including the values obtained by the previous test).

 

Burning times and rates for the fastest test item mixtures

Test	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]
10%	203	0.99	191	1.05	196	1.02	191	1.05	214	0.94	205	0.98
20%	228	0.88	215	0.93	212	0.94	238	0.84	220	0.91	216	0.93
30%	245	0.82	249	0.8	256	0.78	247	0.81	244	0.82	270	0.74

 

The maximum burning rate of the mixtures of the test item and cellulose (1.05 mm/s) was lower than the maximum burning rate of the reference mixture of cellulose and barium nitrate (1.68 mm/s).

 

The test item, pure substance, has no oxidizing properties in the sense of the EU Method A. 17.

Reference 2

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

8 to 17 July 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess, Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Contact with:

powdered cellulose

Sample tested:

test mixture as specified

Remarks:

2:1 test item / cellulose

Parameter:

preliminary test

Result:

>= 10 - <= 11 s

Remarks on result:

other: The burning extinguished after the reported times. The cone was still mostly intact. The reaction was not violent.

Sample tested:

reference mixture as specified

Remarks:

2:1 barium nitrate / cellulose

Parameter:

preliminary test

Result:

>= 55 - <= 59 s

Key result

Sample tested:

reference mixture as specified

Remarks:

60:40 barium nitrate/cellulose

Parameter:

maximum burning rate

Result:

1.59 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

10:90 test item / cellulose

Parameter:

maximum burning rate

Result:

0.85 mm/s

Preliminary test

Three test mixtures with the test item and cellulose 2:1 did not burn down completely. The mixtures burned for 10 s, 11 s and 11 s before the burning extinguished. The cone was still mostly intact. The reaction was not violent.

Three test mixtures with barium nitrate and cellulose 2:1 burned down completely in 59 s, 55 s and 56 s.

Due to the results of the preliminary test the main test had to be performed.

 

Main test

Four tests were performed for the reference mixture (barium nitrate and cellulose) with 50, 55, 60 and 70 wt. % of oxidizer (barium nitrate). The highest burning rate of 1.59 mm/s was found for the mixture with 60 wt. % of oxidizer.

Mixtures of the test item with cellulose were prepared in different percentages. The results of the test of the different mixtures are reported in the table below.

 

Burning times and rates of test item mixtures

Test item [%]	Burning time over 200 mm [s]	Burning rate [mm/s]
10	237	0.84
20	249	0.80
30	307	0.65
40	170 (extinguished after 79 mm)	(0.47)
50	The mixture extinguished in the pre-burning phase	-
70	The mixture extinguished in the pre-burning phase	-
90	The mixture could not be ignited	-

 

The maximum burning rate of the mixtures of the test item with cellulose was lower than the maximum burning rate of the reference mixture. Five more tests were performed with the three mixtures with the highest burning rates to verify these values. Results are reported in the table below (including the values obtained by the previous test).

 

Burning times and rates for the fastest test item mixtures

Test	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]	t [s]	V [mm/s]
10%	237	0.84	246	0.81	248	0.81	243	0.82	252	0.79	235	0.85
20%	249	0.80	270	0.74	267	0.75	271	0.74	251	0.80	263	0.76
30%	307	0.65	286	0.70	316	0.63	313	0.64	308	0.65	316	0.63

 

The maximum burning rate of the mixtures of the test item and cellulose (0.85 mm/s) was lower than the maximum burning rate of the reference mixture of cellulose and barium nitrate (1.59 mm/s).

 

The test item, pure substance, has no oxidizing properties in the sense of the EU Method A. 17.

Description of key information

The substance has no oxidizing properties in the sense of the EU Method A.17.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

The available data on oxidising properties of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are therefore conclusive but not sufficient for classification: Based on burning rate tests with cellulose, the substance has no oxidising properties.