3-bromo-1-(3-chloropyrid-2-yl)-5-methyl-1H-pyrazole

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

20 November 2019 to 16 March 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Purity: 94.5 %
Storage Condition: Ambient temperature, cool and dry conditions, DEFITRACES.

Contact with:

powdered cellulose

Key result

Sample tested:

test mixture as specified

Remarks:

10/90 test item/cellulose

Parameter:

burning rate

Result:

2.3 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

20/80 test item/cellulose

Parameter:

burning rate

Result:

2.42 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

20/80 test item/cellulose

Parameter:

maximum burning rate

Result:

2.5 mm/s

Main test – Increments

Experimental conditions

Atmospheric pressure: 97.0 kPa to 97.3 kPa

Humidity From: 21.3% to 22.9%

 

With reference item mixtures:

Mixture containing (% w/w) Reference item / Cellulose	Burning rates (mm/s)	Maximum burning rates (% w/w)
10 / 90	2.82	10 / 90 20 / 80 30 / 70
20 / 80	2.41
30 / 70	2.02
40 / 60	1.80
50 / 50	1.79
60 / 40	1.85
70 / 30	1.57
80 / 20	/
90 / 10	/

With test item mixtures:

Mixture containing (% w/w) Test item / Cellulose	Burning rates (mm/s)	Maximum burning rates (% w/w)
10 / 90	2.35	10 / 90 20 / 80
20 / 80	2.41
30 / 70	/
40 / 60	/
50 / 50	/
60 / 40	/
70 / 30	/
80 / 20	/
90 / 10	/

Main test – series

 

For each mixture, only the six measured values of burning rate which not differ from

the arithmetic mean value for more than 10% were presented in the following tables.

 

With reference item mixtures

Atmospheric pressure: From 96.7 kPa to 97.0 kPa

Humidity: From 22.2% to 28.2%

Mixture containing (% w/w) Reference item / Cellulose	Burning rates (mm/s)	Mean value (mm/s)	Maximal burning rate (mm/s)	Maximal Deviation (%)
10/90	2.94	2.83	2.94	3.8
	2.90
	2.74
	2.74
	2.86
	2.82*
20/80	2.47	2.43	2.47	2.2
	2.41
	2.38
	2.47
	2.47
	2.41*

*This assay was issued from the main test - increments.

 

Remark: As only two mixtures Test item / Cellulose had burning rates measurements during the Main test – Series. Increments, only two mixtures Reference item / Cellulose were tested during the Main test – Series.

 

With test item mixtures

Atmospheric pressure: From 96.7 kPa to 97.0 kPa

Humidity From: 22.2% to 28.2%

Mixture containing (% w/w) Test item / Cellulose	Burning rates (mm/s)	Mean value (mm/s)	Maximal burning rate (mm/s)	Maximal Deviation (%)
20/80	2.41	2.42	2.50	3.5
	2.50
	2.35
	2.35
	2.47
	2.41*
10/90	2.30	2.30	2.35	3.6
	2.35
	2.25
	2.22
	2.35
	2.35*

*This assay was issued from the main test - increments.

Interpretation of results:

GHS criteria not met

Conclusions:

3-Bromo-1-(3-Chloro-2-Pyridyl)-5-Methyl-1H-Pyrazole was not considered to have oxidising properties under the experimental conditions used.

Executive summary:

In compliance with Regulation (EC) No. 1907/2006, Council Regulation (EC) No. 440/2008, EC A.17. Method (2008) for 3-Bromo-1-(3-Chloro-2-Pyridyl)-5-Methyl-1H-Pyrazole the following parameters were measured:

 

The maximum burning rate obtained with the test item was 2.50 mm/s for the test item / cellulose mixture (20/80% w/w).

The maximum burning rate obtained with the reference item was 2.94 mm/s for the reference item / cellulose mixture (10/90% w/w).

The maximum burning rate of test item / cellulose mixture was slower than the maximum burning rate with reference item / cellulose mixture.

The test item was not considered to have oxidizing properties under the experimental conditions used.

Description of key information

In compliance with Regulation (EC) No. 1907/2006, Council Regulation (EC) No. 440/2008, EC A.17. Method (2008) for 3-Bromo-1-(3-Chloro-2-Pyridyl)-5-Methyl-1H-Pyrazole the following parameters were measured:

 

The maximum burning rate obtained with the test item was 2.50 mm/s for the test item / cellulose mixture (20/80% w/w).

The maximum burning rate obtained with the reference item was 2.94 mm/s for the reference item / cellulose mixture (10/90% w/w).

The maximum burning rate of test item / cellulose mixture was slower than the maximum burning rate with reference item / cellulose mixture.

The test item was not considered to have oxidizing properties under the experimental conditions used.

 

Justification

No oxidising properties were found in a test according to EC A.17 (2008).

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

No oxidising properties were found in a test according to EC A.17. (2008). This is in accordance with the chemical structrure of the substance. According to EU regulation 1272/2008 no classsification is necessary.