Oligomerisation products of alpha-pinene and beta-pinene

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

13 December 2016 - 14 December 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

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

Qualifier:

according to guideline

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

2015-03-05

Auto-ignition temperature:

ca. 259 °C

Atm. press.:

ca. 983 hPa

Remarks on result:

other: First determination

Auto-ignition temperature:

ca. 266 °C

Remarks on result:

other: Second determination

Auto-ignition temperature:

ca. 259 °C

Atm. press.:

ca. 978 hPa

Remarks on result:

other: Third determination

Key result

Auto-ignition temperature:

ca. 255 °C

Remarks on result:

other: Final value

Results (see table):

First trial:

The preselected auto-ignition temperature was set to 150°C but no ignition occurred during this trial.

Second trial:

The preselected auto-ignition temperature was set to 350°C.

Firstly, VORB program was used with an amount of 5 droplets for each test.

Ignition occured for a sample temperature of 280.7°C.

Then H-A1 program and H-A2 program were conducted.

For the first determination, H-A1 program was performed from 276°C using 5 droplets by decreasing temperature in 5°C steps as ignition occurred.

At 276°C, ignition did not occur so the amount of test item that is injected was modified. Tests were performed with 2 and 8 droplets.

Ignition occurred using 8 droplets and so the temperature was decreased again in 5°C steps till 261°C. Tests were then performed continuing to vary the amount of droplets till no ignition occurs whatever the amount of droplets. The last ignition occurred at 261°C using 11 droplets.

H-A2 program was then used from 259°C using 11 droplets and the test were continued, in varying the amount of droplets and decreasing the temperature in 2°C steps.

The last ignition occurrred at 259°C using 11 droplets and correspond to the first auto-ignition temperature (LASTIP on raw data).

For the second determination, temperature was then increased to the value obtained with VORB program (281°C) and H-A1 program was performed using 11 droplets. The same operatory mode as for the first determination was performed and the lowest auto-ignition was found at 266°C using 11 droplets.

A third determination was performed as for the second one and a lowest auto-ignition temperature of 259°C with 11 droplets was found.

The lowest value (259°C) was reduced by the absolute deviation calculated using the reproducibility value (1.5% relative) and rounded up to the next 1°C.

A final auto-ignition temperature (END IP VALUE in raw data) of 255°C was obtained.

The atmospheric temperature was 983.0 hPa at the beginning of the test and 978.0 hPa at the end of the test.

Conclusions:

According to EU method A.15, auto-ignition temperature of 255°C was estimated for the test item.

Executive summary:

Auto-ignition temperature of TERPENIC OLIGOMERS Batch 16 -03 SI was determined according to EU method A.15.

Two trials were conducted. In the first one, the preselected auto-ignition temperature was set to 150°C but no ignition occurred and the test stopped automatically. In the second one, the preselected auto-ignition temperature was set to 350°C. The auto-ignition of the substance was tested in varying amount of substance (between 2 and 11 droplets) and temperature (between 256 and 282.5°C). Finally, three determinations were performed and then, three lowest auto-ignition temperatures were recorded as 259°C, 266°C and 259°C respectively using 11, 11 and 11 droplets.

As these temperatures did not differ by more than 2% from the mean, these results were considered as valid and the lowest value (259°C) was retained. As described in DIN EN 14522:2005, the final auto-ignition temperature was obtained in reducing the retained value by the absolute deviation calculated using the reproducibility value (1.5% relative).

This value was rounded up to the next 1°C and a final auto-ignition temperature (END IP VALUE in raw data) of 255°C was obtained.

The atmospheric pressure was 983.0 hPa at the beginning of the test and 978.0 hPa at the end of the test.

Description of key information

The self-ignition temperature of terpenic oligomers was determined at atmospheric pressure to be 255°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

255 °C

Additional information

Well performed study was conducted according to EU A.15 guideline and under GLP to determine the self-ignition temperature of terpenic oligomers. The result was considered as reliable without restriction.