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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04-12 October 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The study was conducted according to an internationally recognised method, and under GLP. The substance is considered to be adequately characterised. Therefore full validation applies.
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
The study was performed closely following the standard DIN 51794:2003-05
Deviations:
no
Principles of method if other than guideline:
not applicable
GLP compliance:
yes (incl. QA statement)
Remarks:
inspected on 20 and 21 June 2017 / signed on 04 September 2017
Key result
Auto-ignition temperature:
285 °C
Atm. press.:
>= 1 005.2 - <= 1 013.6 hPa

Results of the preliminary test:

Temperatures where auto-ignition was detected are marked with +; temperatures where no auto-ignition was detected are marked with - in the table below. The amount of test item tested at each measurement is indicated as numbers of portions (1 portion: approximately 0.1 g).

Table1: Auto-ignition temperature (preliminary test)

Preliminary test

T / °C

portions

+ / -

Time lag / s

202

5

-

-

252

5

-

-

302

5

-

-

352

5

+

5

322

5

+

10

barometric pressure: 1017.6 hPa

The lowest auto-ignition temperature of the test item was determined to be 322°C in the preliminary test.

Results of the Main tests:

Table 2: Auto-ignition temperature (summary)

Main test series  Auto-ignition temperature / °C Portions Time lag / s Barometric pressure / hPa
1st main test (5K) 287 7 110 1005.2 - 1010.5
1st main test (2K) 288 7 90 1010.5 - 1013.6
2nd main test (2K) 289

7

100

1012.3

3rd main test (2K)

288

7

105

1012.0

The lowest auto-ignition temperature of the test item was determined to be 287°C in the main test.

The auto-ignition-temperatures were below 300 °C and the three lowest results of the tests with 2 K steps were within a range of 10 K. Therefore, the results were considered as valid.

Due to safety reasons and according to the guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 285 °C (1005.2 - 1013.6 hPa)

Conclusions:
This parameter/method is not relevant for classification, however the information is useful regarding potential additional fire hazard. No particular hazard is anticipated in normal conditions of storage.
Executive summary:

The study was conducted under GLP according to standard DIN 51794:2003 -05 (listed in EU A.15 guideline).

Under the test conditions, the lowest temperature that will result in the ignition of the test item after being injected into the apparatus was determined as 285 °C between 1005.2 and 1012.3 hPa. This value was determined using approximately 0.7g of test substance. The test substance showed auto ignition after 110 seconds.

Description of key information

The auto-ignition temperature of the test item is stated as 285 °C (1005.2 - 1013.6 hPa).

No particular hazard is anticipated in normal conditions of storage

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
285 °C

Additional information

A GLP fully reliable experimental study, conducted according to a recognized EU/DIN method, is available. Therefore, it is considered as a key study. The result is retained as key data.

 

This parameter is not relevant for classification, however the information is useful regarding process safety and potential additional fire hazard

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