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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:
2015-12-14 to 2014-12-17
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))
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
483 °C
Atm. press.:
1 013 hPa

Preliminary test:

Volume of test item injected in the oven: 70µL

Assay No.

Temperature of the assay (°C)

Auto ignition

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

Atmospheric pressure (kPa)

Relative humidity (%)

Observed

Corrected

Y/N

Lag (S)

Observed

Corrected

1

100

100

No

/

/

/

98.4

38

2

149

149

No

/

/

/

98.4

39

3

203

203

No

/

/

/

98.5

39

4

255

255

No

/

/

/

98.6

40

5

303

303

No

/

/

/

99.0

37

6

350

349

No

/

/

/

99.0

38

7

400

399

No

/

/

/

98.9

39

8

450

449

No

/

/

/

98.9

38

9

504

503

Yes

10

550

549

98.9

38

10

493

492

Yes

50

532

531

98.9

40

11

483

482

No

/

/

/

98.9

42

 

The auto ignition temperature was situated between 482°C and 492°C (corrected values). This range is given for information, the final result is given by the main test in following section.

 

Main test:

Volume of test item injected in the oven: 70µL

Assay No. 1

Assay No.

Temperature of the assay (°C)

Auto ignition

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

Atmospheric pressure (kPa)

Relative humidity (%)

Observed

Corrected

Y/N

Lag (S)

Observed

Corrected

1

486

485

Yes

32

495

494

99.4

43

2

484

483

No

/

/

/

99.5

41

3

485

484

No

/

/

/

99.5

44

 

Assay No. 2

Assay No.

Temperature of the assay (°C)

Auto ignition

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

Atmospheric pressure (kPa)

Relative humidity (%)

Observed

Corrected

Y/N

Lag (S)

Observed

Corrected

1

484

483

Yes

71

500

499

99.4

45

2

483

482

No

/

/

/

99.4

46

 

Assay No. 3

Assay No.

Temperature of the assay (°C)

Auto ignition

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

Atmospheric pressure (kPa)

Relative humidity (%)

Observed

Corrected

Y/N

Lag (S)

Observed

Corrected

1

483

482

No

/

/

/

99.5

47

2

484

483

No

/

/

/

99.5

46

3

485

484

No

/

/

/

99.5

46

4

486

485

Yes

46

498

497

99.5

46

 

Assay No. 4

Assay No.

Temperature of the assay (°C)

Auto ignition

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

Atmospheric pressure (kPa)

Relative humidity (%)

Observed

Corrected

Y/N

Lag (S)

Observed

Corrected

1

486

485

No

/

/

/

99.3

34

2

487

486

No

/

/

/

99.3

36

3

488

487

Yes

23

496

495

99.3

36

 

Assay No. 5

Assay No.

Temperature of the assay (°C)

Auto ignition

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

Atmospheric pressure (kPa)

Relative humidity (%)

Observed

Corrected

Y/N

Lag (S)

Observed

Corrected

1

487

486

Yes

66

503

502

99.3

39

2

485

484

No

/

/

/

99.9

39

3

486

485

No

/

/

/

99.1

42

 

Conclusion:

Only the runs with an auto ignition observed for each assay are summarised in the following table.

Assay No.

Auto-ignition temperature (°C)

Auto-ignition

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

Atmospheric pressure (kPa)

Relative humidity (%)

Observed

Corrected

Lag (s)

Observed

Corrected

1

486

485

32

495

494

99.4

43

2

484

483

71

500

499

99.4

45

3

486

485

46

498

497

99.5

46

4

488

487

23

496

495

99.3

36

5

487

486

66

503

502

99.1

42

 

The auto-ignition temperature of the test item was 483±3°C (corrected temperature)

Conclusions:
An autoflammability value of 483±3°C at 1013 hPa was determined for the substance in accordance with a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Autoignition temperature: 483°C (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
483 °C

Additional information

An autoignition temperature of 483±3°C was determined in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.

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