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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:
2010-05-20 to 2010-05-25
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Qualifier:
according to
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Qualifier:
according to
Guideline:
IEC 60079-4 (Electrical apparatus for explosive gas atmospheres. Part 4: Method of test for ignition temperature)
GLP compliance:
yes (incl. certificate)
Key result
Auto-ignition temperature:
275 °C
Atm. press.:
1 013.5 - 1 030.7 hPa

Preliminary test:

The estimated auto-ignition temperature was 290°C.

Main test:

The results of the main study are reported in the table below.

Ignition of the test substance within 5 minutes after introduction was observed with each sample volume and with each test a minimum auto-ignition temperature was obtained. The maximum deviation between the three values was <10°C.

The lowest temperature at which ignition of the test substance occurred was 275°C, which is also the auto-ignition temperature if rounded down to the nearest 5°C.

Auto-ignition temperature of the test substance:

Test

Volume [µL]

Auto-ignition

Temperature [°C]

Ignition delay [s]

Colour of the flame

Minimum

auto-ignition

temperature [°C]

Test 1

70

289

26

Orange/blue

278

150

282

44

Orange/blue

500

286

32

Orange/blue

Test 2

80

292

32

Orange/blue

275

25

281

45

Orange/blue

300

278

51

Orange/blue

Test 3

75

293

36

Orange/blue

276

260

282

53

Orange/blue

400

281

39

Orange/blue

The auto-ignition temperature of the test substance at 1013.5 -1030.7 hPa was 275°C.

Conclusions:
An auto-ignition temperature value of 275°C at 1013.5 - 1030.7 hPa was determined in a reliable study conducted according to an appropriate test protocol. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 275°C at 1013.5 -  1030.7 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
275 °C

Additional information

An auto-ignition temperature value of 275°C at 1013.5 - 1030.7 hPa was determined for the substance in accordance with EU Method A.15 and in compliance with GLP. The result is considered to be reliable and selected as key study.

In a secondary source to which reliability could not be assigned, an auto-ignition temperature value of 360°C was reported for the substance.