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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
20-02-2018 to 26-07-2018
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:
345 °C
Atm. press.:
1 013 hPa
Remarks on result:
preliminary test
Auto-ignition temperature:
335 °C
Atm. press.:
>= 1 013 - <= 1 020 hPa
Remarks on result:
other: Definitive Test (minimum auto-ignition temperature) in triplicate

Preliminary test

The estimated auto-ignition temperature was 345°C.

 

Main study

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 < 20°C. According to the guidelines, no further testing was required. The lowest temperature at which ignition of the test item occurred was 336°C. This temperature was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test item of 335°C.

 

Table 1.0 - 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

50

356

8

orange/green

347

 

70

347

9

 

 

 

150

354

11

 

 

2

60

355

7

orange/green

336

 

100

336

13

 

 

 

200

359

9

 

 

 

300

365

10

 

 

3

80

356

7

orange/green

345

 

150

345

11

 

 

 

220

362

6

 

 

Conclusions:
The auto-ignition temperature of the test item was determined to be 335°C at between 1013 and 1020 hPa.
Executive summary:

The auto-ignition temperature was determined using EU Method A.15 and DIN 51794 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 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 < 20°C. According to the guidelines, no further testing was required The lowest temperature at which ignition of the test item occurred was 336°C. This temperature was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test item of 335°C. Under the conditions of the study, the auto-ignition temperature was determined to be 335°C at between 1013 and 1020 hPa.

Description of key information

Auto-ignition temperature: 335 °C at ca. 1 atmosphere, EU Method A.15, 2018

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
335 °C

Additional information

Key study : EU Method A.15, 2018 : The auto-ignition temperature was determined using EU Method A.15 and DIN 51794 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 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 < 20°C. According to the guidelines, no further testing was required The lowest temperature at which ignition of the test item occurred was 336°C. This temperature was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test item of 335°C. Under the conditions of the study, the auto-ignition temperature was determined to be 335°C at between 1013 and 1020 hPa.