(2-methyl-5-propan-2-ylcyclopentyl) propanoate

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:

Experimental Dates: 30 September - 06 October 2020

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study without detailed documentation

Remarks:

The study was conducted according to an internationally recognised method, and under GLP. No deviation affected the quality of the study. The substance is adequately identified, but some data on composition is missing. Therefore validation applies with restrictions.

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

Regulation (EC) No 440/2008, with no update to the A15 method since 2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

DIN EN 14522, Method S (Determination of the auto ignition temperature of gases and vapours)

Version / remarks:

2005

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

signed on 15 Nov. 2018

Key result

Auto-ignition temperature:

263 °C

Atm. press.:

>= 974 - <= 979 hPa

First determination:

Step 1: The preselected auto-ignition temperature was set to 350°C. Ignition occurred for a sample temperature of 296.6°C.

Step 2: For the first determination, the program was performed from 292°C using 5 droplets by decreasing temperature in 5°C steps as ignition occurred.

Step 3: At 277°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 267°C where no ignition occurs whatever the amount of droplets. The last ignition occurred at 272°C using 8 droplets.

Steps 4 to 6: the program was then used from 270°C using 8 droplets by decreasing temperature in 2°C steps as ignition occurred. At 268°C, ignition did not occur whatever the amount of droplets. The last ignition occurred at 270°C using 11 droplets.

Step 7: The last ignition occurred at 270°C using 8 droplets, ignition time lag was 57 seconds and correspond to the first auto-ignition temperature.

Second determination:

Temperature was then increased to the value obtained with first determination/step 1 program (297°C) and the program was performed using 8 droplets. The same operatory mode as for the first determination was performed and the lowest auto-ignition was found at 272°C using 8 droplets, ignition time lag was 50 seconds.

Third determination:

A third determination was performed as for the second one and a lowest auto-ignition temperature of 267°C with 8 droplets (ignition time lag 62 seconds) was found.
The lowest value (267°C obtained during the third determination) was automatically reduced by the absolute deviation calculated using the reproducibility value (1.5% relative) and rounded to the nearest 1 °C.
A final auto-ignition temperature of 263°C was obtained.
The atmospheric pressure was 974 hPa at the beginning of the test and 979 hPa at the end of the test.
No fume or noise was observed throughout the test.

Conclusions:

This parameter/method is not relevant for classification; however the information is useful regarding process safety and potential additional fire hazard.
No particular hazard is anticipated in normal conditions of storage.

Executive summary:

The auto-ignition temperature of the test substance was measured, under GLP, according to EU A15 guideline and DIN 14522 standard.

Three test series were performed, where different volumes of test substance were injected into a heated flask, until the lowest temperature at which ignition occurs was determined. The relevant parameters were recorded for the final result.

The lowest of the three value was retained, corrected for uncertainty standard and rounded to the nearest °C as described in DIN 14522, resulting in an auto-ignition temperature of 263°C.

Description of key information

No particular hazard is anticipated in normal conditions of storage.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

263 °C

Additional information

A reliable experimental study, conducted according to a recognized DIN/EU method and under GLP, is available. Despite minor restrictions due to incomplete test item identification, it is considered as a key study, and the result is retained as key data.

This parameter is not relevant for classification, however the information is useful regarding process safety and potential additional fire hazard.