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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-flammability
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Justification for type of information:
The main constituents of dipentene multiconstituent present at concentration above 10% are d-limonène, l-limonène and beta-phellandrene. It has the same main constituents as REACTION MASS OF BETA-PHELLANDRENE AND D-LIMONENE AND L-LIMONENE. Therefore, data on dipentene multiconstituent can be used for extrapolation to REACTION MASS OF BETA-PHELLANDRENE AND D-LIMONENE AND L-LIMONENE. See read-across justification document in section 13.
Reason / purpose:
read-across source
Key result
Auto-ignition temperature:
245 °C
Atm. press.:
99 724 Pa
Remarks on result:
other:

Determination

Value

Ignition delay

Drops used

First experiment

250 °C

41 seconds

6

Second experiment

255 °C

29 seconds

6

Third experiment

245 °C

48 seconds

8

Fourth experiment

245 °C

47 seconds

8

The highest value was discarded (printed in grey italics, second experiment). For the final calculation, the values from the first, third and fourth experiment were evaluated.

The lowest value of the auto ignition temperature is 245 °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 245 °C.

Conclusions:
In this study, an auto ignition temperature of 245 °C was determined according to method EU A.15. This value was the lowest value in three independent determinations.

Executive summary:

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

The lowest measured value of five experiments was 245 °C.

According to the followed 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. Therefore, the final auto-ignition temperature of the test item was stated as 245 °C.

Description of key information

The auto-ignition temperature of Reaction mass of beta-phellandrene and d-limonene and l-limonene at atmospheric pressure is 245 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
245 °C

Additional information

A well performed study was conducted to determine the auto ignition temperature of dipentene multiconstituent, according to Guideline EU A. 15 and GLP. A reliability of 1 was assigned and the result is considered as key value for the chemical safety assessment.

For further information on read-across justification, see section 13 "justification of read-across".