(4E)-4-(3,3,4-trimethylcyclopentylidene)butanal

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: 25 to 30 September 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

The study was conducted according to an internationally recognised method, and under GLP. The substance is adequately characterised. Therefore full validation applies.

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

Specific details on test material used for the study:

Actual storage conditions: Ambient temperature away from light. Kept in the original container.

Key result

Auto-ignition temperature:

205 °C

Atm. press.:

>= 977 - <= 978 hPa

First determination:

Step 1: The preselected auto-ignition temperature was set to 350°C. Ignition occurred for a sample temperature of 255.2°C.

Step 2: For the first determination, the program was performed from 250°C using 5 droplets by decreasing temperature in 5°C steps as ignition occurred.

Step 3: At 220°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 215°C where ignition did not occur. Tests were performed with 2, 5 and 11 droplets. Ignition occurred using 11 droplets and so the temperature was decreased again in 5°C steps till 205°C where no ignition occurs whatever the amount of droplets. The last ignition occurred at 210°C using 11 droplets.

Steps 4 to 6: the program was then used from 208°C using 11, 8, 5, and 2 droplets but no ignition occurred.

Step 7: The last ignition occurred at 210°C using 11 droplets, ignition time lag was 40 seconds and correspond to the first auto-ignition temperature.

Second determination:

Temperature was then increased to the value obtained first determination/step 1 program (255°C) and the 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 208°C using 11 droplets, ignition time lag was 47 seconds.

Third determination:

A third determination was performed as for the second one and measurement stopped during the step 3 when the program was performed at 205°C with 2 droplets. Measurement was restarted from this point and a lowest auto-ignition temperature of 215°C with 9 droplets (ignition time lag 34 seconds) was found. When a measurement is started directly on step 2 to 6 programs, the number of drops differs from the step 1 program. The number of drops is 3, 6 and 9.

As the three determinations did not differ by more than 2% from the mean, these results were considered as valid. The lowest value (208°C obtained during the second determination) was manually reduced by the absolute deviation calculated using the reproducibility value (1.5% relative) and rounded to the nearest 1 °C.

208 x 0.985 = 204.88°C => rounded to 205°C

A final auto-ignition temperature of 205°C was obtained.

The atmospheric pressure was 978 hPa at the beginning of the test and 977 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 205°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:

205 °C

Additional information

A fully reliable experimental study, conducted according to a recognized DIN/EU method and under GLP, is available. 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.