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Auto flammability

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Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-05-26 to 2010-09-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Well documented study performed according to EU A.15 guideline, under GLP and without deviation
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
GLP compliance:
yes (incl. certificate)
Key result
Auto-ignition temperature:
255 °C
Atm. press.:
ca. 99 600 Pa
Remarks on result:
other:

Experiment

Value

Ignition delay

Drops used

First Experiment

255

63

8

Second Experiment

255

46

8

Third Experiment

260

35

5

The lowest value of the auto ignition temperature is 255 °C.

The auto ignition temperature (result of determination) is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto ignition temperature is stated as 255 °C.

Conclusions:
In this study, three independent experiments allowed to determine an auto ignition temperature of 255 °C for alpha-pinene multiconstituent.
Executive summary:

A study was performed according to EU A.15 guideline to determine the auto-ignition temperature of alpha-pinene multiconstituent.

According to this guideline, the auto-ignition temperature should be the lowest value from the lowest values of three experiments, rounded down to a whole multiple of 5 °C. The final auto-ignition temperature of the test item was then stated as 255 °C.

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

Endpoint:
auto-ignition temperature (liquids)
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Justification for type of information:
α-Pinene is a bicyclic monounsaturated monoterpene and (-)-α-pinene is an enantiomeric form of α-pinene. Therefore, data on (-)-alpha pinene can be extrapolated to alpha-pinene. (see read-across justification document in section 13).
Reason / purpose:
read-across source
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
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.

Conclusions:
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

Self-ignition temperature of alpha-pinene multiconstituent at atmospheric pressure: 255 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
255 °C

Additional information

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