Reaction mass of 1-(3,3-dimethylcyclohexyl)ethyl acetate and 2,6,6-trimethylcycloheptanol acetate

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:

2019-03-18 to 2019-03-20

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

no

Key result

Auto-ignition temperature:

310 °C

Atm. press.:

1 013.25 hPa

Preliminary Test

An approximate value of the ignition temperature of the test item was first determined by a preliminary test. The table below summarizes the results of the preliminary test. An “ignition” is indicated as “+” and “no ignition” as “-“. 5 drops were added into the Erlenmeyer flask at each temperature. 

Results of the preliminary test

	Preliminary test
Temperature /°C	206	254	302	350	343	333	323	313	305
Ignition / +/-	-	-	-	+	+	+	+	+	-
	Atmospheric pressure: 1005.8 - 1014.8 hPa

In the preliminary test, an ignition was observed at 313 °C.

 

Main Test

The lowest temperatures at which an ignition occurred in the main tests are given in the table below. 

Lowest temperatures at which an ignition occurred

Main test series	Lowest temperatures of an ignition	Highest temperatures without an ignition	Atmospheric Pressure
1	316 °C	313 °C	1014.9 hPa
2	311 °C	309 °C	1015.3 - 1021.2 hPa
3	314 °C	311 °C	1021.7- 1022.3 hPa

Based on results of the main test series, the lowest autoignition temperature was 311 °C.

Regulation EC No. 440/2008 and DIN 51794: The auto-ignition temperature rounded down to the nearest multiple of 5°C was determined as 310°C.

Conclusions:

The auto-ignition temperature was determined to be 310 °C at 1013.25 hPa.

Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 Part A A.15 to determine the auto-ignition temperature of the test substance. In a preliminary test the approximately auto-ignition temperature was determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 5 K until no ignition was observed. The test was repeated with slighter temperature steps to determine the auto-ignition temperature more accurate. Based on results of the main test series, the lowest auto-ignition temperature was 311°C. All three values lay within a range of 20 K. According to criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value out of three experiments rounded down to a whole multiple of 5°C. Therefore the auto-ignition temperature was stated to be 310°C.

Description of key information

The auto-ignition temperature was determined to be 310 °C at 1013.25 hPa.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

310 °C

Additional information

A study was conducted according to Regulation (EC) No 440/2008 Part A A.15 to determine the auto-ignition temperature of the test substance. In a preliminary test the approximately auto-ignition temperature was determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 5 K until no ignition was observed. The test was repeated with slighter temperature steps to determine the auto-ignition temperature more accurate. Based on results of the main test series, the lowest auto-ignition temperature was 311°C. All three values lay within a range of 20 K. According to criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value out of three experiments rounded down to a whole multiple of 5°C. Therefore the auto-ignition temperature was stated to be 310°C.