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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-04-09 to 2018-08-23
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:
no
Specific details on test material used for the study:
- Test item: Pationic ISL
- CAS No.: 66988-04-03
- Molecular weight: 450.59 g/mol
- Sum formula: C24H43O6Na
- Identity: 67.8% acid value, 213 saponification value
- Physical state: Yellow viscous liquid
- Storage: 10 °C - 30 °C
Key result
Auto-ignition temperature:
420 °C
Atm. press.:
ca. 1 000 hPa

Preliminary test

Table 1 shows the results of the preliminary test. Temperatures where auto-ignition was detected are marked with + and temperatures where no auto-ignition was detected are marked with -. The amount of test item tested at each measurement is indicated as numbers of drops.

Table 1: Auto-ignition temperature (preliminary test). Barometric pressure 999.6 hPa.

T / °C

Portions

+/-

Time lag / s

202

5

-

-

252

5

-

-

302

5

-

-

352

5

-

-

402

5

-

-

452

5

+

5

422

5

-

-

442

5

+

5

The lowest auto-ignition temperature of the test item was determined to be 442 °C in the preliminary test.

Main test

Tables 2 to 5 show the results of the main test. Temperatures where auto-ignition was detected are marked with + and temperatures where no auto-ignition was detected are marked with -. The amount of test item tested at each measurement is indicated as numbers of drops.

Table 2: Auto-ignition temperature (1st main test, part 1)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

442

5

+

8

422

1

-

-

437

5

-

-

422

2

-

-

437

8

+

2

422

4

-

-

432

8

+

6

422

6

-

-

427

8

+

6

 

 

 

 

422

8

-

-

 

 

 

 

422

5

-

-

 

 

 

 

422

10

-

-

 

 

 

 

422

3

-

-

 

 

 

 

422

7

-

-

 

 

 

 

422

9

-

-

 

 

 

 

Barometric pressure: 997.6 hPa

Barometric pressure: 996.4 hPa

Table 3: Auto-ignition temperature (1st main test, part 2)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

428

8

-

-

428

10

-

-

430

8

-

-

428

3

-

-

432

8

+

2

428

6

-

-

430

8

-

-

428

1

-

-

430

9

-

-

 

 

 

 

430

4

+

6

 

 

 

 

428

4

-

-

 

 

 

 

428

7

-

-

 

 

 

 

428

9

-

-

 

 

 

 

428

5

-

-

 

 

 

 

428

2

-

-

 

 

 

 

428

8

-

-

 

 

 

 

Barometric pressure: 1001.4 hPa

Barometric pressure: 1000.8 hPa

Table 4: Auto-ignition temperature (2nd main test)

T / °C

Portions

+ / -

Time lag / s

431

4

+

5

429

4

-

-

429

8

-

-

429

10

-

-

429

3

-

-

429

1

-

-

429

6

-

-

429

5

-

-

429

9

-

-

429

2

-

-

429

7

-

-

Barometric pressure: 992.6 hPa

Table 5: Auto-ignition temperature (3rd main test)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

431

4

+

2

421

9

-

-

429

4

+

5

421

3

-

-

427

4

+

8

421

10

-

-

425

4

+

8

 

 

 

 

423

4

+

8

 

 

 

 

421

4

-

-

 

 

 

 

421

2

-

-

 

 

 

 

421

7

-

-

 

 

 

 

421

5

-

-

 

 

 

 

421

8

-

-

 

 

 

 

421

1

-

-

 

 

 

 

421

6

-

-

 

 

 

 

Barometric pressure: 999.0 hPa

Barometric pressure: 1003.2 hPa

The lowest auto-ignition temperature of the test item was determined to be 423 °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 420 °C.

Conclusions:
The lowest auto-ignition temperature of the test item was determined to be 423 °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 420 °C.
Executive summary:

The auto-ignition temperature of the test item was determined according to EU Method A.15. The lowest auto-ignition temperature of the test item was determined to be 423 °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 420 °C.

Description of key information

The auto-ignition temperature of the test item was determined according to EU Method A.15. The lowest auto-ignition temperature of the test item was determined to be 423 °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 420 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
420 °C

Additional information

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