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Physical & Chemical properties

Auto flammability

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auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
September 2016
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Well documented study performed according to EU A.15 guideline, under GLP and without deviation
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
according to guideline
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
GLP compliance:
yes (incl. QA statement)
Auto-ignition temperature:
ca. 255 °C
Atm. press.:
ca. 979.6 hPa
Remarks on result:
other: First cycle
Auto-ignition temperature:
ca. 255 °C
Remarks on result:
other: Second cycle
Auto-ignition temperature:
ca. 257 °C
Atm. press.:
ca. 984 hPa
Remarks on result:
other: Third cycle
Key result
Auto-ignition temperature:
ca. 251 °C
Atm. press.:
ca. 984 hPa
Remarks on result:
other: Final value

The auto-ignition temperature (final result) is the result obtained after 3 cycles of measurements.

The apparatus automatically calculated the auto-ignition temperature as described in DIN EN 14522 :2005. The lowest value was retained and, in order to take into account all uncertainties (calibration, temperature measuring system, amount of substance...), this lowest value was reduced by the absolute deviation calculated using the reproducibility value (1.5% relative) as described in DIN EN 14522 :2005. To obtain the final result, this result is rounded up to the next 1°C.

According to EU method A.15, auto-ignition temperature of 251°C was estimated for the test item.
Executive summary:

Auto-ignition temperature of (-)-alpha-pinene was determined according to EU method A.15. The final auto-ignition is the result obtained after 3 cycles of measurements.

The auto-ignition temperatures obtained during the 3 cycles of measurements did not differ by more than 2%, therefore the study is considered as valid.

The final auto-ignition temperature of the test item was stated as 251 °C.

The study was conducted under GLP and without deviation, this result is therefore considered as reliable without restriction.

Description of key information

Auto-ignition temperature of (-)-alpha-pinene at atmospheric pressure is 251 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
251 °C

Additional information

A well performed study was conducted according to Guideline EU A.15 and under GLP to determine the self-ignition temperature of (-)-alpha-pinene. The result was considered as reliable without restriction and is consistent with the result obtained with alpha-pinene multiconstituent.