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Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24-30 July 2018
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. Test substance is adequately characterised. Therefore full validation applies.
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
2008
Deviations:
no
Qualifier:
according to
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
2003
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. certificate)
Remarks:
Inspected from 20 to 21-06-2017 / Signed on 04-09-2017
Key result
Auto-ignition temperature:
250 °C
Atm. press.:
>= 1 005 - <= 1 009.9 hPa

Preliminary test:

The following table shows the 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 (i.e. drops). The results are summarized in Table 1.

Table 1: Auto-ignition temperature (preliminary test)

Preliminary test

T / °C

portions

+ / -

Time lag / s

202

5

-

-

252

5

-

-

302

5

+

0

272

5

+

13

barometric pressure: 1009.2 hPa

The lowest auto-ignition temperature of the test item was determined to be 272 °C in the preliminary test.

Main test:

The results of the main test are compiled in the following table:

Main test series

Auto-ignition temperature / °C

Portions

Time lag / s

Barometric pressure / hPa

1stmain test (5 K)

252

10

75

1008.1 - 1008.4

1stmain test (2 K)

253

10

80

1009.0

2ndmain test (2 K)

254

10

75

1005.0 - 1007.6

3rdmain test (2 K)

253

10

55

1009.9

The lowest auto-ignition temperature of the test item was determined to be 252 °Cin 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 250 °C.

Conclusions:
The auto-ignition temperature of test item was determined to be 250°C.
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 250 °C between 1005 and 1009.9 hPa. This value was determined using 10 drops of test substance. The test substance showed auto ignition after 55 -80 seconds.

Description of key information

The auto-ignition temperature of test item was determined to be 250°C.

No particular hazard is anticipated in normal conditions of storage.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
250 °C

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. It is considered as a key study.

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