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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:
From 17 January 2017 to 19 January 2017
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))
Version / remarks:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
2003
Deviations:
no
Qualifier:
according to guideline
Guideline:
IEC 60079-4 (Electrical apparatus for explosive gas atmospheres. Part 4: Method of test for ignition temperature)
Version / remarks:
1975
Deviations:
no
GLP compliance:
yes
Key result
Auto-ignition temperature:
305 °C
Atm. press.:
>= 1 037.8 - <= 1 040.7 hPa

It was observed that the auto-ignition temperature of the test item decreased with increasing sample volume. The maximum volume tested was 1000 µL (1 mL). It was considered that the volume of 1 mL liquid produces about 200 – 250 mL of test item gas. According to this, the test vessel of 200 mL was completely filled with gas of the test item (i.e. air/oxygen was displaced). The auto-ignition temperature was 308°C and was considered to be representative for the test item. Ignition of the test item at the slightly lower volumes of 900 and 950 µL occurred at 319°C and 318°C, respectively. The maximum deviation for the three minimum values was < 20°C.

The lowest temperature at which ignition of the test item occurred (i.e. 308°C) was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test item of 305°C.

Table: Results of the auto-ignition temperature measurements

 

Test

Volume
[µL]

Auto-ignition
temperature
[°C]

Ignition delay

[s]

Colour of the flame

Minimum auto-ignition
temperature
[°C]

1

70

350

5

orange/blue

308

 

150

345

5

orange/blue

 

 

250

340

5

orange/blue

 

 

700

317

6

orange/blue

 

 

1000

308

10

orange/blue

 

 

 

 

 

 

 

2

100

343

6

orange/blue

319

 

400

332

3

orange/blue

 

 

900

319

4

orange/blue

 

 

 

 

 

 

 

3

50

346

6

orange/blue

318

 

500

343

3

orange/blue

 

 

950

318

5

orange/blue

 

 

Conclusions:
The auto-ignition temperature of the substance at 1038-1041 hPa was determined to be 305°C.
Executive summary:

The auto-ignition temperature of the substance at 1038-1041 hPa was determined to be 305°C in a GLP study according to EC A.15, DIN 51794 and IEC 79-4.

Description of key information

The auto-ignition temperature of the substance at 1038-1041 hPa was determined to be 305°C in a GLP study according to EC A.15, DIN 51794 and IEC 79-4.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
305 °C

Additional information