1H-Pyrazole-5-carboxylic acid, 3-bromo-1-(3-chloro-2-pyridinyl)-

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

12.12.19 - 16.3.2020

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)

Contact with:

powdered cellulose

Key result

Sample tested:

test mixture as specified

Remarks:

10/90 test item/cellulose

Parameter:

burning rate

Result:

2.6 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

20/80 test item/cellulose

Parameter:

burning rate

Result:

1.77 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

30/70 test item/cellulose

Parameter:

burning rate

Remarks on result:

mixture does not ignite and burn

Key result

Sample tested:

reference mixture as specified

Remarks:

10/90 barium nitate/cellulose

Parameter:

burning rate

Remarks on result:

mixture does not ignite and burn

Key result

Sample tested:

reference mixture as specified

Remarks:

20/80 barium nitrate/cellulose

Parameter:

burning rate

Remarks on result:

mixture does not ignite and burn

Key result

Sample tested:

reference mixture as specified

Remarks:

30/70 barium nitrate/cellulose

Parameter:

burning rate

Remarks on result:

mixture does not ignite and burn

Reference item barium nitrate / cellulose mixtures containing 10 to 90% weight of oxidizer (reference item) in 10% increments were prepared.  

The pile was formed by means of a mould. After dropping the mould once from a height of 2 cm onto a solid surface, the remaining excess mixture was scraped off with an obliquely positioned sheet. A non-combustible, non-porous and low heat-conducting plate was then placed on the top of the mould. The apparatus was inverted and the mould was removed.

A hot flame of a gas burner heated to approximately 1000 °C was used as ignition source. The air-speed was sufficient to prevent fumes escaping into the laboratory and did not vary during the test. One end of the pile was ignited by touching with the flame.

The time of reaction over a 200 mm distance after the reaction zone had propagated an initial distance of 30 mm was measured.

After the test was performed with the reference item, the test was then carried out at least once with each mixture of the test item with cellulose.

If the maximum burning rate of the test item / cellulose mixtures was found to be significantly greater than for the reference item / cellulose mixtures, the test could be stopped. Otherwise the test should be continued with the following series, to determine the fastest burning rate.

The test was performed six times for the three mixtures having produced the highest burning rate, both for reference item / cellulose mixtures and for test item / cellulose mixtures.

Interpretation of results:

GHS criteria not met

Conclusions:

3-Bromo-1-(3-chloro-2-pyridinyl)-1H-pyrazole-5-carboxylic acid 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-pyridinyl)-1H-pyrazole-5-carboxylic acid the following parameters were measured:

The maximum burning rate obtained with the test item was 2.60 mm/s for the test item / cellulose mixture (10/90% 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-pyridinyl)-1H-pyrazole-5-carboxylic acid the following parameters were measured:

The maximum burning rate obtained with the test item was 2.60 mm/s for the test item / cellulose mixture (10/90% 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.

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.