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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:
2010-06-01 to 2010-06-07
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
235 °C
Atm. press.:
1 014 - 1 022.5 hPa
Remarks on result:
other: The value was obtained with a sample volume of 1 ml in a 200 ml glass vessel and was rounded off to the nearest multiple of 5°C.

The estimated auto-ignition temperature in the preliminary study was 250°C.

The results of the main study on the determination of the auto-ignition temperature of the test

substance are given in Table 1.

It was observed that the auto-ignition temperature of the test substance decreased with

increasing the sample volume. At a volume of 1 ml in a 200 ml glass vessel an auto-ignition

temperature of 238°C was observed. The volume was considered to be the maximum

representative volume of the test and the therefore the temperature obtained at this volume was

rounded off to the nearest multiple of 5°C giving the auto-ignition temperature of the test

substance (i.e. 235°C). No further testing was performed.

Table 1: Results of the main study

Test

Volume [µl]

Temperature [°C] - High

Temperature [°C] - Low

Auto-ignition temperature [°C]

Ignition delay [s]

Colour of the flame

1

70

268

246

252

18

Orange/blue

1

150

255

245

251

23

Orange/blue

1

200

256

244

250

36

Orange/blue

1

250

256

242

248

38

Orange/blue

1

400

254

238

244

59

Orange/blue

1

600

248

236

242

83

Orange/blue

1

700

249

235

241

85

Orange/blue

1

900

244

234

240

81

Orange/blue

1

1000

242

232

238

76

Orange/blue

Conclusions:
A self-ignition temperature of 235°C at 1014.0 – 1022.5 hPa was determined in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.

Description of key information

Auto flammability: 235°C at 1014.0 – 1022.5 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
235 °C

Additional information

A measured auto-ignition temperature of 235°C at 1014.0 – 1022.5 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.

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