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Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2020-06-10 to 2020-06-23
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
AFNOR: NF T 20-037
Version / remarks:
1985
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
294 °C
Atm. press.:
98.4 kPa

Results:

Preliminary results:

Injection No.

Volume of test item injected in the oven

(µL)

Temperature
(°C)

Auto-ignition

Maximal temperature of the air recorded in the centre of the test flask after auto-ignition (°C)

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Y / N

Lag(s)

Observed

Corrected

1

70

105

105

N

/

/

/

97.8

39

2

70

150

150

N

/

/

/

97.8

38

3

70

200

201

N

/

/

/

97.7

36

4

70

252

253

N

/

/

/

97.2

39

5

70

300

301

N

/

/

/

97.2

40

6

70

353

354

Y

3

363

364

97.0

38

7

70

335

336

Y

4

351

352

97.0

38

8

70

323

324

Y

8

338

339

96.9

34

9

70

314

315

Y

10

329

330

96.9

36

10

70

308

309

N

/

/

/

96.7

48

11

90

308

309

Y

12

322

323

96.7

47

12

90

306

307

Y

13

324

325

96.8

45

13

90

303

304

Y

13

320

321

96.8

43

14

90

300

301

N

/

/

/

96.8

42

15

110

303

304

Y

17

317

318

96.8

42

16

110

299

300

Y

22

314

315

97.9

36

17

110

296

297

Y

24

313

314

97.8

35

18

110

293

294

N

/

/

/

97.9

38

19

130

293

294

N

/

/

/

97.9

38

20

130

295

296

N

/

/

/

97.8

37

21

130

297

298

N

/

/

/

97.8

37

22

130

299

300

Y

18

309

310

97.8

36

23

150

293

294

N

/

/

/

97.8

36

24

170

293

294

Y

22

310

311

97.8

35

25

170

291

292

N

/

/

/

97.8

38

26

150

291

292

N

/

/

/

97.7

39

27

190

291

292

N

/

/

/

97.7

36

28

190

293

294

N

/

/

/

97.7

40

29

190

295

296

N

/

/

/

97.7

40

 

The lowest auto-ignition temperature was found at about 294°C (corrected value) with a volume of 170 µL.

The main test was conducted using this volume.

Main test:

Volume of the test item injected in the oven: 170 µL

Assay No.1:

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

Maximal temperature of the air recorded in the centre of the test flask after auto-ignition (°C)

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

292

293

N

/

/

/

97.8

37

2

293

294

N

/

/

/

97.8

37

3

294

295

Y

20

308

309

97.8

37

 

Assay No. 2:

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

Maximal temperature of the air recorded in the centre of the test flask after auto-ignition (°C)

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

293

294

N

/

/

/

97.7

37

2

294

295

Y

21

309

310

97.7

37

 

Assay No. 3:

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

Maximal temperature of the air recorded in the centre of the test flask after auto-ignition (°C)

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

293

294

N

/

/

/

98.3

47

2

294

295

N

/

/

/

98.3

41

3

295

296

N

/

/

/

98.2

39

4

296

297

N

/

/

/

98.2

38

5

297

298

Y

16

313

314

98.2

38

 

Assay No. 4:

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

Maximal temperature of the air recorded in the centre of the test flask after auto-ignition (°C)

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

296

297

N

/

/

/

98.6

38

2

297

298

Y

20

305

306

98.6

38

 

Assay No. 5:

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

Maximal temperature of the air recorded in the centre of the test flask after auto-ignition (°C)

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

294

295

Y

21

306

307

98.5

38

2

293

294

Y

22

308

309

98.4

38

3

292

293

N

/

/

/

98.4

38

 

Summary:

Only the auto-ignition runs for each assay are summarised in the following table:

 

Auto-ignition temperature (°C)

Auto-ignition

Maximal temperature of the air recorded in the centre of the test flask after ignition (°C)

Atmospheric pressure
(kPa)

Relative humidity
(%)

Assay No.

Observed

Corrected

Lag (s)

Observed

Corrected

1

294

295

20

308

309

97.8

37

2

294

295

21

309

310

97.7

37

3

297

298

16

313

314

98.2

38

4

297

298

20

305

306

98.6

38

5

293

294

22

308

309

98.4

38

 

Conclusion:

The auto-ignition temperature of the test item was 294 ± 3°C (corrected temperature).

 

Conclusions:
An auto-ignition temperature value of 294 ± 3°C at 98.4 kPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 294 ± 3°C at 98.4 kPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
294 °C

Additional information

A measured auto-ignition temperature value of 294 ± 3°C at 98.4 kPa was determined for the registered substance using a relevant test method and in compliance with GLP. The result is considered to be reliable and is selected as key study.

In available secondary sources to which reliability could not be assigned, auto-ignition temperature values of 280°C and 290°C were reported for the substance.

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