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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-05-17 to 2018-09-18
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: Esterlac SLL
- CAS No.: 13557-75-0
- Molecular weight: 294.37 g/mol
- Sum formula: C18H31NaO6
- Identity: 64.2% aicd value, 194 saponification number
- Physical state: Light yellow paste
- Storage: 10 °C - 30 °C
Key result
Auto-ignition temperature:
460 °C
Atm. press.:
ca. 1 010 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 (1 portion = 1 drop = approx. 0.1 g).

Table 1: Auto-ignition temperature (preliminary test). Barometric pressure 1011.8 hPa

T / °C

Portions

+ / -

Time lag / s

202

5

-

-

252

5

-

-

302

5

-

-

352

5

-

-

402

5

-

-

452

5

-

-

502

5

-

-

552

5

+

130

522

5

-

-

542

5

+

205

The lowest auto-ignition temperature of the test item was determined to be 542 °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 portions.

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

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

542

5

+

110

 

 

 

 

537

5

+

175

 

 

 

 

532

5

-

-

 

 

 

 

532

3

-

-

 

 

 

 

532

2

-

-

 

 

 

 

532

7

-

-

 

 

 

 

532

10

-

-

 

 

 

 

532

6

-

-

 

 

 

 

532

1

-

-

 

 

 

 

532

4

-

-

 

 

 

 

532

8

-

-

 

 

 

 

532

9

 

 

 

 

 

 

Barometric pressure: 1015.5 hPa

Barometric pressure: - hPa

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

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

537

5

+

0

521

5

+

120

535

5

+

0

519

5

-

-

533

5

+

2

519

10

-

-

531

5

+

2

519

1

-

-

529

5

+

30

519

9

-

-

527

5

+

0

519

2

-

-

525

5

+

0

519

8

-

-

523

5

+

2

519

4

-

-

 

 

 

 

519

7

+

100

 

 

 

 

517

7

-

-

 

 

 

 

517

10

-

-

 

 

 

 

517

1

-

-

Barometric pressure: 1006.7 hPa

Barometric pressure: 1009.9 hPa

Table 4: Auto-ignition temperature (1st main test, part 2 continued)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

517

9

+

210

501

10

+

275

515

9

+

205

499

10

+

0

513

9

+

210

497

10

-

-

511

9

+

120

497

1

-

-

509

9

+

0

497

9

+

0

507

9

-

-

495

9

+

240

507

5

-

-

493

9

-

-

507

10

+

240

493

2

-

-

505

10

-

-

493

10

-

-

505

9

+

140

493

1

-

-

503

9

+

250

493

8

-

-

501

9

-

-

493

3

-

-

 

 

 

 

493

7

-

-

 

 

 

 

493

5

-

-

 

 

 

 

493

4

-

-

 

 

 

 

493

6

-

-

Barometric pressure: 1011.9 hPa

Barometric pressure: 1011.8 hPa

Table 5: Auto-ignition temperature (2nd main test)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

496

9

+

0

488

8

-

-

494

9

+

2

488

9

-

-

492

9

-

-

488

3

+

5

492

5

-

-

486

3

-

-

492

6

-

-

486

8

-

-

492

3

-

-

486

9

-

-

492

2

-

-

486

1

-

-

492

8

+

3

486

4

+

5

490

8

+

0

484

4

+

5

 

 

 

 

482

4

+

5

 

 

 

 

480

4

-

-

 

 

 

 

480

5

-

-

Barometric pressure: 1010.6 hPa

Barometric pressure: 1007.2 hPa

Table 6: Auto-ignition temperature (2nd main test, continued)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

480

2

-

-

 

 

 

 

480

7

-

-

 

 

 

 

480

8

-

-

 

 

 

 

480

3

-

-

 

 

 

 

480

9

-

-

 

 

 

 

480

10

-

-

 

 

 

 

480

6

-

-

 

 

 

 

480

1

-

-

 

 

 

 

Barometric pressure: 1008.7 hPa

Barometric pressure: - hPa

Table 7: Auto-ignition temperature (3rd main test)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

483

4

+

3

469

2

-

-

481

4

+

3

469

10

+

6

479

4

+

3

467

10

+

7

477

4

+

5

465

10

-

-

475

4

+

5

465

8

-

-

473

4

+

5

465

9

-

-

471

7

+

8

 

 

 

 

469

7

-

-

 

 

 

 

469

9

-

-

 

 

 

 

469

4

-

-

 

 

 

 

469

5

-

-

 

 

 

 

Barometric pressure: 1005.5 hPa

Barometric pressure: 1005.0 hPa

Table 8: Auto-ignition temperature (3rd main test, continued)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

465

7

-

-

 

 

 

 

465

1

-

-

 

 

 

 

465

2

-

-

 

 

 

 

465

3

-

-

 

 

 

 

465

6

-

-

 

 

 

 

465

4

-

-

 

 

 

 

465

5

-

-

 

 

 

 

465

10

-

-

 

 

 

 

Barometric pressure: 1006.5 hPa

Barometric pressure: - hPa

Table 9: Auto-ignition temperature (4th main test)

T / °C

Portions

+ / -

Time lag / s

T / °C

Portions

+ / -

Time lag / s

468

10

+

3

462

8

-

-

466

10

+

5

 

 

 

 

464

10

+

5

 

 

 

 

462

10

-

-

 

 

 

 

462

7

-

-

 

 

 

 

462

1

-

-

 

 

 

 

462

3

-

-

 

 

 

 

462

5

-

-

 

 

 

 

462

2

-

-

 

 

 

 

462

6

-

-

 

 

 

 

462

4

-

-

 

 

 

 

462

9

-

-

 

 

 

 

Barometric pressure: 1008.5 hPa

Barometric pressure: 1008.3 hPa

The lowest auto-ignition temperature of the test item was determined to be 464 °C in the main test. The auto-ignition temperatures were above 300 °C and the three lowest results of the tests with 2 K steps (2nd, 3rd, 4th main test) were within a range of 20 K (the 1st main experiment was waived as it was not within the range). 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 460 °C.

Conclusions:
The lowest auto-ignition temperature of the test item was determined to be 464 °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 460 °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 464 °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 460 °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 464 °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 460 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
460 °C

Additional information