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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:
from 2017-03-27 to 2017-06-12
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:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Deviations:
no
GLP compliance:
no
Key result
Auto-ignition temperature:
245 °C
Atm. press.:
>= 1 012.6 - <= 1 020.2 hPa

Preliminary test

Table 1. Preliminary test

T / °C

Portions (drops)

Ignition (+/-)

Time lag / s

202

5

-

-

252

5

-

-

302

5

+

5

272

5

+

15

Barometric pressure: 1019.6 hPa

 The lowest auto-ignition temperature of the test item was determined to be 272 °C in the preliminary test.

Main test

Table 2. 1st main test – 5 °C steps

1st main test (5 °C steps)

T / °C

Portions (drops)

Ignition (+/-)

Time lag / s

272

5

+

15

267

5

+

18

262

5

+

20

257

5

+

45

252

5

+

55

247

5

-

-

247

3

-

-

247

8

-

-

247

2

-

-

247

7

-

-

247

1

-

-

247

10

-

-

247

9

-

-

247

6

-

-

247

4

-

-

Barometric pressure: 1016.7 hPa

 

Table 3. 1st mains test – 2 °C steps

1st main test (2 °C steps)

T / °C

Portions (drops)

Ignition (+/-)

Time lag / s

252

5

-

-

254

5

+

50

252

5

-

-

252

8

-

-

252

3

 

-

252

5

-

-

252

1

-

-

252

10

+

50

250

10

+

80

248

10

-

-

248

8

-

-

248

5

-

-

248

3

-

-

248

1

-

-

248

9

-

-

248

2

-

-

248

7

-

-

248

6

-

-

248

4

-

-

Barometric pressure: 1020.2 hPa

 

Table 4. 2nd main test

2nd main test (2 °C steps)

T / °C

Portions (drops)

Ignition (+/-)

Time lag / s

251

10

-

-

253

10

-

-

255

10

+

80

253

10

+

65

251

10

-

-

251

5

-

-

251

8

-

-

251

4

-

-

251

9

-

-

251

3

-

-

251

1

-

-

251

7

-

-

251

10

-

-

Barometric pressure: 1020.2 hPa

 

 

 

 

251

2

-

-

251

6

-

-

Barometric pressure: 1019.3 hPa

 

Table 5. 3rd mains test

3rd main test (2 °C steps)

T / °C

Portions (drops)

Ignition (+/-)

Time lag / s

253

10

-

-

255

10

+

40

253

10

-

-

253

5

-

-

253

9

-

-

253

2

-

-

253

4

-

-

253

1

-

-

253

3

-

-

253

7

+

50

251

7

-

-

251

10

-

-

Barometric pressure: 1012.6 hPa

251

5

-

-

251

3

-

-

251

1

-

-

251

9

-

-

251

6

-

-

251

8

-

-

251

4

-

-

251

2

-

-

Barometric pressure: 1019.2 hPa

 

Table 6. Summary from all main test

Main test series

Auto-ignition temperature / °C

Time lag / s

1st main test (5 K)

252

55

1st main test (2 K)

250

80

2nd main test (2 K)

253

65

3rd main test (2 K)

253

50

 

The lowest auto-ignition temperature of the test item was determined to be 250 °C in the main test. The auto-ignition temperature was rounded to the next lower number by 5 °C resulting in and auto-ignition temperature of 245 °C.

Conclusions:
The auto-ignition of the test item was determined to be 245 °C.
Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 Part A.15 and DIN 51794 to determine the auto-ignition temperature of the test substance. In a preliminary test the approximate auto-ignition temperature was determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 2 and 5 K until no ignition was observed. According to criteria laid down in Regulation EC No. 440/2008 method A.15 and DIN 51794 the auto-ignition temperature is the lowest value rounded down to a whole multiple of 5 °C. Therefore, the auto-ignition temperature was determined to be 245 °C at 1012 -1020 hPa.

Description of key information

The auto-ignition of the test item was determined to be 245 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
245 °C

Additional information

A study (reference 4.12-1) was conducted according to Regulation (EC) No 440/2008 Part A.15 and DIN 51794 to determine the auto-ignition temperature of the test substance. In a preliminary test the approximate auto-ignition temperature was determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 2 and 5 K until no ignition was observed. According to criteria laid down in Regulation EC No. 440/2008 method A.15 and DIN 51794 the auto-ignition temperature is the lowest value rounded down to a whole multiple of 5 °C. Therefore, the auto-ignition temperature was determined to be 245 °C at 1012 -1020 hPa.