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Physical & Chemical properties

Auto flammability

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Link to relevant study record(s)

Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2019-03-20 to 2019-04-17
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:
254 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: 254 ± 3°C

Preliminary test:

Injection No.

Volume of test item injected in the oven

(µL)

Temperature
(°C)

Auto-ignition

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

Atm pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Y / N

Lag (s)

Observed

Corrected

1

70

105

105

N

/

/

/

97.6

36

2

70

147

147

N

/

/

/

97.6

33

3

70

198

198

N

/

/

/

97.6

33

4

70

250

250

N

/

/

/

97.6

31

5

70

300

300

Y

4

316

316

97.6

33

6

70

282

282

Y

13

299

299

97.6

33

7

70

272

272

Y

37

294

294

97.6

33

8

70

261

261

N

/

/

/

97.6

32

9

70

266

266

N

/

/

/

97.6

31

10

70

269

269

N

/

/

/

97.6

31

11

90

269

269

Y

37

286

286

98.3

25

12

90

266

266

Y

71

289

289

98.3

24

13

90

263

263

N

/

/

/

98.2

24

14

110

263

263

Y

81

285

285

98.2

24

15

110

260

260

N

/

/

/

97.9

24

16

130

260

260

Y

98

281

281

97.8

23

17

130

257

257

N

/

/

/

97.7

21

18

150

257

257

Y

122

279

279

98.2

37

19

150

254

254

N

/

/

/

98.2

37

20

170

254

254

N

/

/

/

98.2

36

21

190

254

254

Y

191

277

277

98.3

38

22

190

251

251

N

/

/

/

98.2

39

 

The lowest auto-ignition temperature was found to be around 254°C (observed value) with a volume of 190 µL.

 

The main test was conducted using this volume.

 

Main test

Volume of test item injected in the oven: 190 µL

Assay No. 1

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

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

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

254

254

Y

174

277

277

98.4

40

2

253

253

N

/

/

/

98.4

39

 

Assay No. 2

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

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

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

254

254

N

/

/

/

98.3

38

2

255

255

Y

183

277

277

98.3

37

 

Assay No. 3

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

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

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

254

254

Y

226

277

277

98.2

33

2

253

253

N

/

/

/

98.1

33

 

Assay No. 4

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

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

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

253

253

N

/

/

/

98.1

33

2

254

254

N

/

/

/

98.1

33

3

255

255

Y

167

278

278

98.0

31

 

Assay No. 5

Injection No.

Temperature (°C)

Auto-ignition

Lag (s)

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

Atmospheric pressure
(kPa)

Relative humidity
(%)

Observed

Corrected

Observed

Corrected

1

255

255

Y

190

277

277

98.0

30

2

254

254

N

/

/

/

98.0

30

 

 

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 center of the test flask after ignition (°C)

Atmospheric pressure
(kPa)

Relative humidity
(%)

Assay No.

Observed

Corrected

Lag (s)

Observed

Corrected

1

254

254

174

277

277

98.4

40

2

255

255

183

277

277

98.3

37

3

254

254

226

277

277

98.2

33

4

255

255

167

278

278

98.0

31

5

255

255

190

277

277

98.0

30

 

 

Conclusion:

The auto-ignition temperature of the test item was 254 ± 3°C (corrected temperature).

 

 

 

 

 

Conclusions:
An auto-ignition temperature of 254 ± 3°C at 101.3 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: 254 ± 3°C at 1013 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
254 °C

Additional information

A measured auto-ignition temperature of 254 ± 3°C at 1013 hPa was determined for the registered substance in accordance with EC A.15. Method (2008) and in compliance with GLP. The result is considered to be reliable and is selected as key study.