4-[3-(4-chlorophenyl)-4,5-dihydro-1H-pyrazol-1-yl]benzenesulphonamide

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Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March from 14th to 15th, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

GLP compliance:

yes (incl. QA statement)

Remarks on result:

no self-ignition observed up to the melting point

The cube was filled with the test item and tapped gently, test item was added more until the cube was completely filled. The cube was then suspended in the center of the oven at room temperature. The temperature was raised up to 222.5°C at a rate of 0.5°C/minute. From the obtained graph representing the temperatures T1 (Test item temperature) and T2 (Oven temperature) as a function of test period time, very sharp temperature rise above the oven temperature was not observed, which indicates that the test item does not  undergo self ignition up to the melting temperature (ca 222 °C).

Replicate 1		Replicate 2
Test item Temperature (°C)	Oven Temperature (°C)	Test item Temperature (°C)	Oven Temperature (°C)
25.2	27.1	25.6	27.8
32.7	34.6	33.1	35.3
40.2	42.1	40.6	42.8
47.7	49.6	48.1	50.3
55.2	57.1	55.6	57.8
62.7	64.6	63.1	65.3
70.2	72.1	70.6	72.8
77.7	79.6	78.1	80.3
85.2	87.1	85.6	87.8
92.7	94.6	93.1	95.3
100.2	102.1	100.6	102.8
107.7	109.6	108.1	110.3
115.2	117.1	115.6	117.8
122.7	124.6	123.1	125.3
130.2	132.1	130.6	132.8
137.7	139.6	138.1	140.3
145.2	147.1	145.6	147.8
152.7	154.6	153.1	155.3
160.2	162.1	160.6	162.8
167.7	169.6	168.1	170.3
175.2	177.1	175.6	177.8
182.7	184.6	183.1	185.3
190.2	192.1	190.6	192.8
197.7	199.6	198.1	200.3
205.2	207.1	205.6	207.8
212.7	214.6	213.1	215.3
220.2	222.1	220.6	222.8

Conclusions:

Not self ignition up to the melting temperature (222.5 °C).

Executive summary:

The determination of self ignition temperature of the substance was conducted in accordance with the European Communities guideline “A.16. Relative Self Ignition Temperature of Solids”.

The cube was filled with the test item and tapped gently; the substance was added more until the cube was completely filled. The cube was then suspended in the center of the oven at room temperature. The temperature was raised up to the melting temperature at a rate of 0.5 °C/minute. From the obtained graph representing the temperatures as a function of test period time, very sharp temperature rise above the oven temperature was not observed, which indicates that the test item does not undergo self ignition up to the melting temperature (222.5 °C).

Conclusion

Not self ignition up to the melting temperature (222.5 °C).

Description of key information

Not self ignition up to the melting temperature (222.5 °C).

Additional information

EU Method A.16