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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:
2017-12-21 to 2018-02-27
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
GLP compliance:
no
Specific details on test material used for the study:
Name: tert-Butyl glycidyl ether
CAS No.: 7665-72-7
Batch No.: ZMG-195668
Appearance: Clear colourless liquid
Molecular formula: C7H14O2
Composition: 99.8% (area)
Storage conditions: Room temperature, protected from light
Expiry date: 27 January 2018
Key result
Auto-ignition temperature:
375 °C
Atm. press.:
ca. 1 atm

Preliminary test

An approximate value of the ignition temperature of the test item was first determined by a preliminary test. Table 1 gives the results of the preliminary test. An ignition is denoted as “+” and no ignition is denoted as “-“. 5 drops were put into the Erlenmeyer flask at each temperature. In the preliminary test, the lowest temperature at which an ignition occured was 404 °C.

Table 1: Results of the preliminary test

Temperature / °C

203

253

303

349

404

392

Ignition / +/-

-

-

-

-

+

-

 

Atmospheric pressure: 1021.4 hPa

Main test

The lowest temperatures at which an ignition occured in the main test are given in Table 2. Based on results of the main test series, the lowest auto-ignition temperature was 375 °C.

Table 2: Lowest temperatures at which an ignition occured

Main test series

Lowest temperatures of an ignition / °C

Highest temperatures without an ignition / °C

Atmospheric pressure

1

378

375

1020.3 – 1021.6 hPa

2

379

375

1020.1 hPa

3

379

375

999.9 – 1001.1 hPa

The test item has an auto-ignition temperature of 375 °C according to the Regulation EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Determination of Ignition Temperature. It is noted here that according to ECHA guidance – Guidance on information requirements and chemical safety assessment: chapter R.7A: Endpoint specific guidance, October 2015 – the auto-ignition temperature for liquids is not used directly for classification and labeling according to Regulation (EC) 1272/2008. However, it can be used in the chemical safety assessment in considering risks associated with processing the substance. According to DIN EN 13463-1 the test item has to be assigned to temperature class T2.

Conclusions:
The auto-ignition temperature of the test item was 375 °C.
Executive summary:

The auto-ignition temperature of the test item was determined according to EC Method A.15. Based on results of the main test series, the lowest auto-ignition temperature was 375 °C.

Description of key information

The auto-ignition temperature of the test item was determined according to EC Method A.15. Based on results of the main test series, the lowest auto-ignition temperature was 375 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
375 °C

Additional information