Alkanes, C10-13-iso-

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:

21 Nov - 01 Dec 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

GLP guideline study

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

adopted in 2008

Qualifier:

according to guideline

Guideline:

DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)

Version / remarks:

adopted in 2003

Qualifier:

according to guideline

Guideline:

other: DIN EN 14522

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess. Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Key result

Auto-ignition temperature:

370 °C

Atm. press.:

ca. 1 013 hPa

Results
Preliminary test
An approximate value of ignition temperature of the test item was first determined by a preliminary test. Table 1 gives the result of the preliminary test. An ignition is denoted as ‘+’ and no ignition is denoted as ‘-‘. Five drops were put into an Erlenmeyer flask at each temperature.

Table 1 – Results of the preliminary test

Temperature [°C]	203	253	304	355	404	394	383	371
Ignition [+/-]	-	-	-	-	+	+	+	-
Atmospheric pressure [hPa]	1006.6			1001.6

 

In the preliminary test, the lowest temperature at which an ignition occurred was 383 °C.

Main Test
The lowest temperatures at which an ignition occurred in the main test are given in Table 2. Any type of flame within 5 minutes after addition will be counted as ignition.

Table 2 – Lowest temperatures at which an ignition occurred

Main test series	Lowest temperature of an ignition [°C]	Highest temperatures without an ignition [°C]	Atmospheric pressure [hPa]
1	383.4 (5 drops)	380.3	1002.4
3	375.2 (4 drops)	374.6	996.0
4	373.2 (3 drops)	372.2
5	373.6 (2 drops)	371.9

 

Based on results of the main test series, the lowest auto-ignition temperature was 373.2 °C.

Regulation EC No. 440/2008 and DIN 51794: The auto-ignition temperature rounded down to the neared multiple of 5°C was determined as 370 °C.

For information:
DIN EN 14522: The auto-ignition temperature reduced by 1.5% and rounded to the nearest integer temperature was determined as 368 °C. According to DIN EN 14522 at least 3 of the lowest ignition temperatures found in different test series must lie in the range of 2%. In the main test the range is 2.66%. The determination of the auto ignition temperature according to DIN EN 14522 is only for information, so no further test were carried out to get in the range of 2%.

Final Results
The test item has an auto-ignition temperature of 370 °C according to the Regulation EC No. 440/2008 Method A.15 Auto-ignition temperature (liquids and gases) and DIN 51794 (2003): Determination of Ignition Temperature. It is noted here that according to ECHA guidance – Guidance of information requirements and chemical safety assessment; chapter R.7A: Endpoint specific guidance, October 2015 – the auto-ignition temperature for liquids is not used directly for classification and labelling according to Regulation (EC) 1272/2008. However, it can be used in the chemical safety assessment in considering risks associated with processing the substance.

According to DIN EN 13463-1 the test item has to be assigned to temperature class T2 (see Table 3).

Table 3 – Temperature classes

Temperature Class	Maximum surface temperature/minimum auto-ignition temperature [°C]
T1	450
T2	300
T3	200
T4	135
T5	100
T6	85

Conclusions:

370°C at ca. 1013 hPa (EU Method A.15)

Executive summary:

370°C at ca. 1013 hPa (EU Method A.15).

Description of key information

370°C at ca. 1013 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

370 °C