Registration Dossier

Diss Factsheets

Physical & Chemical properties

Auto flammability

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
09 Jun - 24 Jun 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
GLP guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
adopted in 2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
Landesamt für Umwelt, Wasserwirtschaft und Gewerbeaufsicht, Mainz, Germany
Specific details on test material used for the study:
Storage conditions: room temperature (20 ± 5 °C), keep away from light
Auto-ignition temperature:
445 °C
Atm. press.:
99 800 Pa

Results
Pre-test
In this measurement the temperature was visually estimated. Ignition attempts are presented in Table 1.

Table 1 – Pre-test ignition attempts (atmospheric pressure of 99,900 Pa)

Time [hh:mm]

Temperature [°C]

Drops used [nr]

Ignition?

Ignition delay [s]

Observations

12:38

Ca.310

2

no

-

fuming

12:46

Ca. 332

2

12:52

Ca. 352

2

12:58

Ca. 375

2

13:03

Ca. 384

2

13:09

Ca. 400

2

13:19

Ca. 421

2

13:27

Ca. 439

2

13:42

Ca. 464

2

yes

instantly

Flame, pop, fuming

 

Main Study – 1stTest Series
Results are shown in Table 2

Table 2 – Ignition attempts first test series (atmospheric pressure of 100,000 Pa)

Time [hh:mm]

Temperature [°C]

Drops used [nr]

Ignition?

Ignition delay [s]

Observations

13.50

465

2

yes

4

Pop, flame, fuming

13:59

460

2

20

14:05

455

2

5

14:12

450

2

6

14:21

445

2

no

-

fuming

14:28

445

5

14:38

445

10

14:59

445

15

15.08

447

15

 

The lowest value of the first test series is 450 °C.

Main Study – Determination of Lowest Value

Table 3 – Ignition attempts determination of lowest value (atmospheric pressure of 99,800 Pa)

Time [hh:mm]

Temperature [°C]

Drops used [nr]

Ignition?

Ignition delay [s]

Observations

09:02

460

2

yes

instantly

Pop, flame, fuming

09:10

455

2

09:23

450

2

09:36

445

2

10

09:52

440

2

no

-

fuming

09:58

440

5

10:05

440

10

10.13

440

15

10.24

442

15

 

The lowest value of the determination of lowest value is 445 °C.

Main Study – Repetition

Table 4 – Ignition attempts repetition (atmospheric pressure of 99,800 Pa)

Time [hh:mm]

Temperature [°C]

Drops used [nr]

Ignition?

Ignition delay [s]

Observations

13:27

445

2

yes

5

Flame, pop, fuming

13.36

450

2

13:42

445

2

no

-

Strong fuming

13:51

445

5

14:01

445

10

14:14

445

15

14:30

447

15

 

The lowest value of the repetition is 450 °C.

Results Summary
The lowest values recorded are shown in Table 5.

Table 5 – Lowest values main study

Experiment

Value [°C]

First test series

450

Determination of lowest value

445

Repetition

450


The lowest value of the auto ignition temperature is 445 °C. This was determined using the 2 drops test item. The test item showed auto ignition after 10 seconds.

Study Plan Deviations
Because the test item was too viscous, it was brought into the test vessel with a 2 mL one-way syringe instead of with a pipette.

The start temperature in experiments 2 and 3 of the main study was 10 K above the last ignition temperature instead of 5 K below.

Four thermos elements were used instead of two, to obtain a better detection of the ignition point.

 

Description of key information

445 °C at 998 hPa (EU Mehtod A.15.)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
445 °C

Additional information

Categories Display