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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:
2017-03-29 to 2017-04-04
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))
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:
276 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: 276 ± 3°C

Preliminary test

Injection No.

Volume of test item injected in the oven (µL)

Temperature (°C)

Temperature (°C)

Auto-ignition

Auto-ignition

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

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

Atm pressure (kPa)

Relative humidity (%)

 

 

Observed

Corrected

Y/N

Lag (secs)

Observed

Corrected

 

 

1

70

96

96

N

/

/

/

99.3

43

2

70

138

138

N

/

/

/

99.2

43

3

70

197

197

N

/

/

/

99.2

41

4

70

251

251

N

/

/

/

99.1

39

5

70

303

303

Y

1

332

332

99.1

36

6

70

284

284

N

/

/

/

99.0

32

7

70

290

290

Y

4

306

306

99.0

32

8

90

284

284

Y

5

308

308

99.0

30

9

90

282

282

Y

6

305

305

99.0

36

10

90

278

278

N

/

/

/

99.0

37

11

110

278

278

N

/

/

/

99.0

39

12

110

280

280

Y

7

301

301

99.0

39

13

90

280

280

N

/

/

/

99.0

38

14

130

278

278

Y

8

303

303

99.0

37

15

130

276

276

N

/

/

/

98.7

39

16

150

276

276

Y

11

291

291

98.7

37

17

150

274

274

N

/

/

/

98.4

33

18

170

274

274

N

/

/

/

98.4

34

19

170

276

276

Y

10

293

293

98.4

34

20

190

276

276

N

/

/

/

98.4

34

 

The lowest auto-ignition temperature was found between 274°C and 276°C (corrected values) with a volume of 170 µL.

The main test will be conducted using this volume.

Main test

Volume of test item injected in the oven 170 µL

Assay No. 1

Injection No.

Temperature (°C)

Temperature (°C)

Auto-ignition

Auto-ignition

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

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

Atm pressure (kPa)

Relative humidity (%)

 

Observed

Corrected

Y/N

Lag (secs)

Observed

Corrected

 

 

1

276

276

Y

9

296

296

98.4

32

2

275

275

N

/

/

/

98.4

32

 

Assay No. 2

Injection No.

Temperature (°C)

Temperature (°C)

Auto-ignition

Auto-ignition

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

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

Atm pressure (kPa)

Relative humidity (%)

 

Observed

Corrected

Y/N

Lag (secs)

Observed

Corrected

 

 

1

276

276

N

1

1

1

98.4

31

2

277

277

N

/

/

/

98.4

32

3

278

278

Y

11

292

292

98.3

31

 

Assay No. 3

Injection No.

Temperature (°C)

Temperature (°C)

Auto-ignition

Auto-ignition

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

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

Atm pressure (kPa)

Relative humidity (%)

 

Observed

Corrected

Y/N

Lag (secs)

Observed

Corrected

 

 

1

277

277

N

/

/

/

98.3

28

2

278

278

Y

8

298

298

98.2

26

 

Assay No. 4

Injection No.

Temperature (°C)

Temperature (°C)

Auto-ignition

Auto-ignition

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

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

Atm pressure (kPa)

Relative humidity (%)

 

Observed

Corrected

Y/N

Lag (secs)

Observed

Corrected

 

 

1

279

279

N

/

/

/

98.7

45

2

280

280

N

/

/

/

98.6

44

3

281

281

Y

9

296

296

98.6

42

 

Assay No. 5

Injection No.

Temperature (°C)

Temperature (°C)

Auto-ignition

Auto-ignition

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

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

Atm pressure (kPa)

Relative humidity (%)

 

Observed

Corrected

Y/N

Lag (secs)

Observed

Corrected

 

 

1

281

281

Y

11

301

301

98.7

37

2

279

279

Y

9

298

298

98.7

38

3

278

278

Y

13

296

296

98.7

35

4

277

277

N

/

/

/

98.7

35

 

Summary

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

Assay No.

Auto-ignition temperature (°C)

Auto-ignition temperature (°C)

Auto-ignition

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

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

Atm pressure (kPa)

Relative humidity (%)

 

Observed

Corrected

Lag (secs)

Observed

Corrected

 

 

1

276

276

9

296

296

98.4

32

2

278

278

11

292

292

98.3

31

3

278

278

8

298

298

98.2

26

4

281

281

9

296

296

98.6

42

5

278

278

13

296

296

98.7

35

 

Conclusion

The auto-ignition temperature of the test item was 276°C ± 3°C (corrected temperature).

 

Conclusions:
An auto-ignition temperature value of 276 ± 3°C at 1013 hPa 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: 276 ± 3°C at 1013 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
276 °C

Additional information

A measured auto-ignition temperature value of 276 ± 3°C at 1013 hPa was determined for the registration substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.