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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-01-27 to 2016-02-12
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
Qualifier:
according to guideline
Guideline:
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
Deviations:
no
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
Deutsches Institut für Normung (DIN), DIN Guide 51794: "Determining the Ignition Temperature of Petroleum Products", May 2003
Deviations:
no
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
GLP compliance:
yes
Key result
Auto-ignition temperature:
320 °C
Atm. press.:
1 014.3 - 1 022 hPa

Preliminary result:

The estimated auto-ignition temperature was 350°C.

Main study:

The results of the main study on the determination of the auto-ignition temperature of the test item are given in Table 1.

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. No minimum auto-ignition temperature as a function of injection volume was observed up to the maximum injection volume of 1000 μl.

The lowest temperature at which ignition of the test item occurred was 324°C. This temperature was a multiple of 5°C and is therefore given as the auto-ignition temperature of the test item.

Table 1: Main study – auto-ignition temperature 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

200

450

800

1000

350

337

332

329

324

11

14

19

7

11

Orange/blue

Orange/blue

Orange/blue

Orange/blue

Orange/blue

324

2

300

600

900

332

329

326

23

26

33

Orange/blue

Orange/blue

Orange/blue

326

3

250

550

950

333

330

327

13

19

27

Orange/blue

Orange/blue

Orange/blue

327

Conclusions:
An auto-ignition temperature value of 320°C at 1014.3 – 1022.0 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 320°C at 1014.3 – 1022.0 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
320 °C

Additional information

An auto-ignition temperature value of 320°C at 1014.3 – 1022.0 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.