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Auto flammability

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Reference
Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
key study
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))
Version / remarks:
dated 31 May 2008
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
LAUS GmbH Auf der Schafweide 20 D-67489 Kirrweiler Germany
Key result
Auto-ignition temperature:
395 °C
Atm. press.:
1 013.25 hPa
Remarks on result:
other:

Pre-Determination

The ignition attempts of the pre-determination program are presented in the following table

Selected T*

T Vessel

Drops used

Ignition?

Observations

°C

°C

#

yes/no

 

300

200.6

5

no

Fume

300

223.9

5

no

Fume

300

245.1

5

no

Fume

300

270.1

5

no

Fume

300

295.1

5

no

Fume

300

320.1

5

no

Fume

300

342.1

5

no

Fume

300

365.9

5

no

Fume

300

386.2

5

no

Fume

500

410.2

5

no

Fume

500

425.1

5

no

Fume

500

447.1

5

yes

Plop and Fume, Ignition after 32 s

*The temperature was selected at the ZPA3 corresponding to an initial oven temperature of 200 °C. As the test item showed no ignition at 386.2 °C, a higher temperature was selected for the subsequent ignition trials corresponding to a new initial oven temperature of 400 °C. Using a constant heating rate, the subsequent ignition trials were conducted every 20 ± 5 K.

 

 

First Test Series

The ignition attempts of the first test series of the main determination (using programs H-A1 and H-A2) are presented in the following table

Used program

Selected T*

T Vessel

Drops used

Ignition?

Observations

 

°C

°C

#

yes/no

 

H-A1

445

444.8

5

yes

Flame and Plop after 11 s

H-A1

440

440.7

5

yes

Flame and Plop after 22 s

 

H-A1

435

435.4

5

yes

Flame and Plop after 20 s

 

H-A1

430

430.6

5

yes

Flame and Plop after 11 s

 

H-A1

425

424.9

5

yes

Flame and Plop after 13 s

 

H-A1

420

420.1

5

yes

Flame and Plop after 15 s

 

H-A1

415

415.0

5

yes

Flame and Plop after 11 s

 

H-A1

410

409.1

5

yes

Flame and Plop after 17 s

 

H-A1

405

404.5

5

no

Fume

 

H-A1

405

405.1

9

yes

Flame and Plop after 17 s

 

H-A1

400

400.5

9

no

Fume

 

H-A1

400

400.5

5

yes

Flame and Plop after 24 s

 

H-A1

395

395.2

5

no

Fume

 

H-A1

395

395.2

9

yes

Flame and Plop after 15 s

 

H-A1

390

390.1

9

no

Fume

 

H-A1

390

390.3

5

no

Fume

 

H-A1

390

390.0

13

no

Fume

 

H-A1

390

390.1

17

no

Fume

 

H-A2

393

393.1

9

no

Fume

 

H-A2

393

393.3

5

no

Fume

 

H-A2

393

393.3

13

no

Fume

 

H-A2

393

392.9

17

no

Fume

 

Lowest value of the first test series is 395 °C.

 

Second Test Series

The ignition attempts of the second test series of the main determination are presented in the following table.

Used program

Selected T*

T Vessel

Drops used

Ignition?

Observations

 

°C

°C

#

yes/no

 

H-A1

400

399.2

9

no

Fume

H-A1

400

399.5

5

no

Fume

H-A1

400

399.6

13

no

Fume

H-A1

400

399.9

17

yes

Flame and Plop after 11 s

H-A1

395

395.5

17

no

Fume

H-A1

395

395.2

13

no

Fume

H-A1

395

395.3

9

no

Fume

H-A1

395

395.5

5

no

Fume

H-A2

398

398.0

17

no

Fume

H-A2

398

398.2

13

no

Fume

H-A2

398

398.2

9

no

Fume

H-A2

398

398.0

5

yes

Flame and Plop after 11 s

H-A2

396

395.9

5

no

Fume

H-A2

396

396.1

9

no

Fume

H-A2

396

395.8

13

no

Fume

H-A2

396

396.2

17

no

Fume

Lowest value of the second test series is 398 °C.

 

Third Test Series

The ignition attempts of the third test series of the main determination are presented in the following table

Used program

Selected T*

T Vessel

Drops used

Ignition?

Observations

 

°C

°C

#

yes/no

 

H-A1

405

405.1

5

no

Fume

H-A1

405

404.9

9

yes

Flame and Plop after 12 s

H-A1

400

399.5

9

yes

Flame and Plop after 9 s

H-A1

395

395.4

9

no

Fume

H-A1

395

394.9

5

no

Fume

H-A1

395

395.1

13

no

Fume

H-A1

395

395.3

17

no

Fume

H-A2

398

398.0

9

no

Fume

H-A2

398

397.9

5

no

Fume

H-A2

398

398.0

13

no

Fume

H-A2

398

398.2

17

no

Fume

Lowest value of the third test series is 400 °C

 

Lowest Values Main Study

Experiment

Value

Ignition delay

Drops used

First Experiment

395 °C

15 s

9

Second Experiment

398 °C

11 s

5

Third Experiment

400 °C

9 s

9

 

Conclusions:
The auto ignition temperature of the test item was determined to be 395 °C at 1013.25 hPa.
Executive summary:

A study was to determine the auto-ignition temperature of the test item according to Regulation (EC) No 440/2008 method A.15 and DIN 51794 Three independent determinations were conducted. The auto-ignition temperature was determined to be 395 °C 398 °C and 400°C respectively. According to the criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto ignition temperature is stated as 395 °C. The three lowest values of the main study lay within a range of 20 K. No observations were made which might cause doubts concerning the validity of the study outcome. Thus, the validation criteria were fulfilled.

Description of key information

The auto ignition temperature of the test item was determined to be 395 °C at 1013.25 hPa.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
395 °C

Additional information

A study was conducted to determine the auto-ignition temperature of the test item according to Regulation (EC) No 440/2008 method A.15 and DIN 51794. Three independent determinations were conducted. The auto-ignition temperature was determined to be 395 °C 398 °C and 400°C respectively. According to the criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto ignition temperature is stated as 395 °C. The three lowest values of the main study lay within a range of 20 K. No observations were made which might cause doubts concerning the validity of the study outcome. Thus, the validation criteria were fulfilled.