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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:
2012-06-29 to 2012-07-03
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))
Deviations:
no
Qualifier:
according to
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Deviations:
no
Qualifier:
according to
Guideline:
IEC 60079-4 (Electrical apparatus for explosive gas atmospheres. Part 4: Method of test for ignition temperature)
Deviations:
no
GLP compliance:
yes
Key result
Auto-ignition temperature:
225 °C
Atm. press.:
ca. 1 008.9 - ca. 1 020.8 hPa

Preliminary study result:

Estimated auto-ignition temperature was 255°C.

Main study result:

The results of the main study are shown in Table 2. 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 228°C. This temperature was a multiple of 5°C and therefore given as the auto-ignition temperature of the test substance.

Table 2: Main study: auto-ignition temperature of the test substance

Test

Volume [µL]

Auto ignition temperature [°C]

Ignition delay [s]

Colour of flame

Minimum auto ignition temperature [°C]

1

70

150

250

400

700

248

237

232

229

232

18

62

61

89

65

Orange/blue

Orange/blue

Orange/blue

Orange/blue

Orange/blue

229

2

100

450

750

242

228

231

53

74

60

Orange/blue

Orange/blue

Orange/blue

228

32

200

500

730

234

229

233

53

64

83

Orange/blue

Orange/blue

Orange/blue

229

Conclusions:
An auto-ignition temperature of 225°C at 1008.9 – 1020.8 hPa was determined for the substance in accordance with an appropriate test method and in compliance with GLP. The result is considered reliable.

Description of key information

Auto-ignition temperature: 225°C at 1008.9 -1020.8 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
225 °C

Additional information

Two reliable auto-ignition temperature studies are available for the registered substance. An auto-ignition temperature of 225°C at 1008.9 - 1020.8 hPa was determined for the substance in accordance with EU Test Method A.15 and in compliance with GLP. The result is considered to be reliable and is selected as key study. This value is supported by a measured auto-ignition temperature of 211°C at 968.7 - 973.8 hPa using DIN EN 14522.