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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:

11-07-2019 to 18-12-2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Guideline study performed under GLP. All relevant validity criteria were met.

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes

Auto-ignition temperature:

265 °C

Atm. press.:

1 009 hPa

Remarks on result:

preliminary test

Auto-ignition temperature:

255 °C

Atm. press.:

>= 1 009 - <= 1 012 hPa

Remarks on result:

other: Definitive Test (minimum auto-ignition temperature) in triplicate

Preliminary test

The estimated auto-ignition temperature was 265°C.

 

Main study

Ignition of the test substance within 5 minutes after introduction was observed with each sample volume and with each test a minimum auto-ignition temperature was obtained. The maximum deviation between the three values was < 10°C. According to the guidelines, no further testing was required. The lowest temperature at which ignition of the test substance occurred was 256°C. This temperature was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test item of 255°C.

 

Table 1. Auto-ignition of the test item

Test	Volume     [μL]	Auto-ignition temperature   [°C]	Ignition delay     [s]	Colour of the flame	Minimum auto-ignition temperature [°C]
1	70	263	28	orange/blue	257
	120	260	37
	170	257	37
	220	260	49
2	150	261	26	orange/blue	256
	190	256	63
	250	257	61
3	180	259	65	orange/blue	256
	230	256	65
	350	259	14

Conclusions:

The auto-ignition temperature of the test item was determined to be 255 °C at 1009 and 1012 hPa.

Executive summary:

The auto-ignition temperature was determined using EU Method A.15 under GLP. The auto-ignition temperature is the lowest temperature at which the test item will ignite when mixed with air under the conditions defined in the test method. Ignition of the test item within 5 minutes after introduction was observed with each sample volume and with each test a minimum auto-ignition temperature was obtained. The maximum deviation between the three values was < 10°C. According to the guidelines, no further testing was required. The lowest temperature at which ignition of the test item occurred was 256°C. This temperature was rounded to the lowest multiple of 5°C and therefore 255°C was given as the auto-ignition temperature of the test item. Under the conditions of the study, the auto-ignition temperature was determined to be 255°C at 1009 and 1012 hPa.

Description of key information

Auto-ignition temperature: 255 °C at ca. 1 atmosphere, EU Method A.15, 2019

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

260 °C

Additional information

Key study : EU Method A.15, 2019 : The auto-ignition temperature was determined using EU Method A.15 under GLP. The auto-ignition temperature is the lowest temperature at which the test item will ignite when mixed with air under the conditions defined in the test method. Ignition of the test item within 5 minutes after introduction was observed with each sample volume and with each test a minimum auto-ignition temperature was obtained. The maximum deviation between the three values was < 10°C. According to the guidelines, no further testing was required. The lowest temperature at which ignition of the test item occurred was 256°C. This temperature was rounded to the lowest multiple of 5°C and therefore 255°C was given as the auto-ignition temperature of the test item. Under the conditions of the study, the auto-ignition temperature was determined to be 255°C at 1009 and 1012 hPa.