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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:
2017-05-24 to 2017-07-06
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:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
2003
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
DIN EN 14522, Method P (Determination of the auto ignition temperature of gases and vapours)
Version / remarks:
2005
Deviations:
not specified
GLP compliance:
yes (incl. QA statement)
Specific details on test material used for the study:
Name: Vinylcyclohexan
CAS No.: 695-12-5
Batch No.: VCH/7/17K1
Purity: 99.8 % (GC)
Description: clear liquid
Auto-ignition temperature:
272 °C
Atm. press.:
>= 1 005.2 - <= 1 007 hPa
Remarks on result:
preliminary test
Key result
Auto-ignition temperature:
255 °C
Atm. press.:
>= 1 003.8 - <= 1 006 hPa
Remarks on result:
other: Rounded down to the nearest multiple of 5 °C

Results

Preliminary Test

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

 

Preliminary test

Temperature / °C

202

248

304

294

283

272

262

Ignition / +/-

-

-

+

+

+

+

-

 

Atmospheric pressure: 1005.2 – 1007.0 hPa

In the preliminary test, the lowest temperature at which an ignition occurred was 272 °C.

Main Test

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

Main test series

Lowest temperatures of an ignition

Highest temperatures without an ignition

Atmospheric Pressure

1

263 °C

260 °C

1004.1 – 1005.0 hPa

2

257 °C

253 °C

1003.8 – 1006.0 hPa

3

259 °C

256 °C

1005.9 hPa

Based on results of the main test series, the lowest auto-ignition temperature was 257 °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 255 °C.

For information:

DIN EN 14522: The auto-ignition temperature reduced by 1.5 % and rounded to the nearest integer temperature was determined as 253 °C.

Conclusions:
The test item vinylcyclohexane has an auto-ignition temperature of 255 °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.
Executive summary:

The test item vinylcyclohexane has an auto-ignition temperature of 255 °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 labelling 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 T3 (see the following Table).

Temperature class

Maximum surface temperature / minimum auto ignition temperature

[°C]

T1

450

T2

300

T3

200

T4

135

T5

100

T6

85

Description of key information

The test item vinylcyclohexane has an auto-ignition temperature of 255 °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.

The auto-ignition temperature for liquids is 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 T3 (see the following table).

Temperature class

Maximum surface temperature / minimum auto ignition temperature

[°C]

T1

450

T2

300

T3

200

T4

135

T5

100

T6

85

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
255 °C

Additional information