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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-11-02 to 2016-12-13
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:
other: DIN EN 14522 (2005): Determination of the Ignition Temperature of gases and liquids
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: DIN 51794 (2003): Determination of Ignition Temperature
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
180 °C
Atm. press.:
> 993.7 - < 996.7 hPa

Preliminary Test

An approximate value of the ignition temperature of the test item was first determined by a preliminary test.

Table 1 gives the result 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.

Table1: Results of the preliminary test

 

Preliminary test

Temperature / °C

203

152

160

172

181

190

Ignition / +/-

+

-

-

-

-

+

 

Atmospheric pressure: 995.2 – 995.3 hPa

In the preliminary test, the lowest temperature at which an ignition occurred was 190 °C.

Main Test

The lowest temperatures at which an ignition occurred in the main test are given Table 2.

Table 2: Lowest temperatures at which an ignition occurred

Main test series

Lowest temperatures of an ignition

Highest temperatures without an ignition

Atmospheric Pressure

1

182 °C

(9 droplets / time-lag 19 s)

178 °C

(1 to 10 droplets)

995.7 – 996.6 hPa

2

182 °C

(9 droplets / time-lag 27 s)

178 °C

(1 to 10 droplets)

996.4 hPa

3

182 °C

(9 droplets / time-lag 24 s)

178 °C

(1 to 10 droplets)

993.7 – 996.7 hPa

Based on results of the main test series, the lowest auto-ignition temperature was 182 °C.

Regulation EC No. 440/2008 and DIN 51794: The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as 180 °C.

 

For information:

DIN EN 14522: The auto-ignition temperature reduced by 1.5 % and rounded to the nearest integer temperature was determined as 179 °C.

Conclusions:
The test item butyl ethyl ether has an auto-ignition temperature of 180 °C according to the Regulation EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003).
Executive summary:

The auto-ignition temperature of butyl ethyl ether was tested in a GLP compliant study according to EU method A.15 (Regulation EC 440/2008), DIN Guide 51794 (2003) and the DIN EN 14522 (2005), using a commercially available auto-ignition temperature apparatus. Samples were injected into the heated-up test vessel. The occurrence of clearly perceptible flames and/or explosions served as indication for auto-ignition. Preliminary findings indicate an auto-ignition temperature of 190 °C. The main study refined the final temperature to 180 °C at 993.7 to 996.7 hPa.

Description of key information

The test item butyl ethyl ether has an auto-ignition temperature of 180 °C according to the Regulation EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003).

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
180 °C

Additional information

The auto-ignition temperature of butyl ethyl ether was tested in a GLP compliant study according to EU method A.15 (Regulation EC 440/2008), DIN Guide 51794 (2003) and the DIN EN 14522 (2005), using a commercially available auto-ignition temperature apparatus. Samples were injected into the heated-up test vessel. The occurrence of clearly perceptible flames and/or explosions served as indication for auto-ignition. Preliminary findings indicate an auto-ignition temperature of 190 °C. The main study refined the final temperature to 180 °C at 993.7 to 996.7 hPa.