Reaction mass of (4R)-isopropenyl-1-methylcyclohexene and (4S)-isopropenyl-1-methylcyclohexene and 1-isopropyl-4-methylcyclohexa-1,3-diene and 1-isopropyl-4-methylcyclohexa-1,4-diene and 4-isopropylidene-1-methylcyclohexene

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:

27 September 2016 - 29 September 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. 232 °C

Atm. press.:

ca. 988 hPa

Remarks on result:

other: First determination

Auto-ignition temperature:

ca. 238 °C

Remarks on result:

other: Second determination

Auto-ignition temperature:

ca. 232 °C

Atm. press.:

ca. 985 hPa

Remarks on result:

other: Third determination

Key result

Auto-ignition temperature:

ca. 229 °C

Remarks on result:

other: Final value

Results (see table):

The preselected auto-ignition temperature was set to 245 °C.

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

Ignition occured for a sample temperature of 271.6°C.

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

For the first determination, H-A1 program was performed from 267 °C using 5 droplets by decreasing temperature in 5 °C steps as ignition occurred.

At 247 °C, ignition did not occur so the amount of test item that is injected was modified. Tests were performed with 2, 8 and 11 droplets.

Ignition occurred using 11 droplets and so the temperature was decreased again in 5 °C steps till 227 °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 232 °C using 11 droplets.

H-A2 program was then used from 230 °C using 11 droplets and the test were continued, in varying the amount of droplets and decreasing the temperature in 2 °C steps.

However no ignition occured using H-A2 program at 230°C using 11 droplets so the last ignition temperature occurred at 232 °C with H-A1 program 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 (272 °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 238 °C using 11 droplets.

A third determination was performed as for the second one and a lowest auto-ignition temperature of 232 °C with 11 droplets was found.

The lowest value (232 °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 229 °C was obtained.

The atmospheric pressure was 988.0 hPa at the beginning of the test and 985.0 hPa at the end of the test.      

Conclusions:

According to EU method A.15, auto-ignition temperature of 229°C was estimated for the test item.

Executive summary:

Auto-ignition temperature of REACTION MASS OF DL-LIMONENE, ALPHA- GAMMA- TERPINENES, TERPINOLENE was determined to EU method A.15.

Only one trial was conducted as an expected auto-ignition temperature appeared on its safety data sheet. The preselected auto-ignition temperature was set to 245 °C and three auto-ignition temperature were recorded (recorded as LASTIP on raw data): 232°C, 238°C and 232°C.

As these three auto-ignition temperature obtained with the determination program did not differ by more than 2%, the results were validated and the lowest value (232 °C) was reduced by the absolute deviation calculated using the reproducibility value (1.5% relative) as described in DIN EN 14522:2005.

This value was rounded up to the next 1 °C and a final auto-ignition temperature (END IP VALUE in raw data) of 229 °C was obtained.

The atmospheric pressure was 988.0 hPa at the beginning of the test and 985.0 hPa at the end of the test.

Description of key information

Auto-ignition temperature of dipentene multiconstituent at atmospheric pressure is 229°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

229 °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 dipentene multiconstituent.

As the results were obtained under GLP without deviation, they were considered as valid and reliable without restriction and used as key value.