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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:
19-11-2014 to 17-02-2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
Qualifier:
according to
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Deviations:
no
GLP compliance:
no
Key result
Auto-ignition temperature:
345 °C
Atm. press.:
>= 1 008.7 - <= 1 018.7 hPa

Preliminary test

The amount of test item tested at each measurement is indicated as numbers of portions (i.e. drops). The lowest auto-ignition temperature of the test item was determined to be 357 °C in the preliminary test.

Tbale 1: Results from the preliminary test

Preliminary test

T / °C

portions

+ / -

Time lag / s

207

5

-

-

257

5

-

-

307

5

-

-

357

5

+

5

327

5

-

-

347

5

-

-

352

5

-

-

barometric pressure: 1008.7 hPa

+ ignition / - no ignition

Main test

Table 2: Auto-ignition temperature (main test, 5 °C steps)

1st main test (5 °C steps)

T / °C

portions

+ / -

Time lag /
s

357

5

+

5

352

5

+

7

348

5

-

-

348

10

-

-

348

1

-

-

348

9

-

-

348

2

-

-

348

8

-

-

348

3

-

-

348

7

-

-

348

4

-

-

348

6

-

-

barometric pressure: 1018.7 hPa

+ ignition / - no ignition

Table 3: Auto-ignition temperature (main test, 2 °C steps)

1st main test (2 °C steps)

T / °C

portions

+ / -

Time lag / s

352

5

+

6

350

5

-

-

350

10

-

-

350

1

-

-

350

9

-

-

350

2

-

-

350

8

-

-

350

3

-

-

350

7

-

-

350

4

-

-

350

6

-

-

barometric pressure: 1016.4 hPa

+ ignition / - no ignition

Table 4: Auto-ignition temperature (main test, 2 °C steps)

2nd main test (2 °C steps)

T / °C

portions

+ / -

Time lag / s

352

5

-

-

354

5

+

5

352

5

-

-

352

10

-

-

352

1

-

-

352

9

-

-

352

2

-

-

352

8

-

-

352

3

-

-

352

7

-

-

352

4

-

-

352

6

-

-

barometric pressure: 1014.7 hPa

+ ignition / - no ignition

Table 5: Auto-ignition temperature (main test, 2 °C steps)

3rd main test (2 °C steps)

T / °C

portions

+ / -

Time lag / s

354

5

+

5

352

5

+

4

350

5

+

5

348

5

-

-

348

10

-

-

348

1

-

-

348

9

-

-

348

2

-

-

348

8

-

-

348

3

-

-

348

7

-

-

348

4

-

-

348

6

-

-

barometric pressure: 1018.4 hPa

 + ignition / - no ignition

Table 6: Summary of all main tests

Main test series

Auto-ignition temperature / °C

Time lag / s

1st mam test

352

6

2nd main test

354

5

3rd main test

350

5

The lowest auto-ignition temperature of the test item was determined to be 350 °C in the main test. Due to safety reasons and according to the guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 345 °C.

Conclusions:
The auto-ignition temperature of the test item was determined to be 345 °C.
Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 Part A.15, and DIN 51794 (2003) 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 - 5 °C 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 345 °C at 1008 - 1018 hPa.

Description of key information

The auto-ignition temperature of the test item was determined to be 345 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
345 °C

Additional information

A study was conducted according to Regulation (EC) No 440/2008 Part A.15, and DIN 51794 (2003) 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 - 5 °C 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 345 °C at 1008 - 1018 hPa (reference 4.12-1).