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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:
15/12/2014 - 17/12/2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Study according to international guideline (EU Method A.15) under GLP. No deviations from guideline reported.
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
Qualifier:
according to
Guideline:
other: DIN 51794 (2003): Determination of Ignition Temperature
Deviations:
no
Principles of method if other than guideline:
Not relevant
GLP compliance:
yes (incl. certificate)
Key result
Auto-ignition temperature:
275 °C
Atm. press.:
>= 993.5 - <= 999.9 hPa
Remarks on result:
other:

Preliminary test

An approximate value of the ignition temperature of the test item was firstly determined by the 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.

Table 1: Results of the preliminary test using the semi-automated apparatus ZT1

 

Preliminary test

Temperature / °C

369

348

309

291

281

Ignition / +/-

+

+

+

+

-

Atmospheric pressure: 1000.7 - 1002.9 hPa

In the preliminary test, the lowest temperature at which an ignition occurred was 291 °C.

Main Test

The results of the main test are given in the following Tables 2 and 3. An ignition is denoted as “+” and no ignition is denoted as “-“.

Table 2:    Determination of the first and second main test series using the semi-automated apparatus ZT1

1stMain test series

2ndMain test series

Temperature / °C

Droplets

Ignition

Temperature / °C

Droplets

Ignition

292

5

+

280

10

+

290

5

+

277

10

-

288

5

-

278

9

-

288

10

+

278

8

-

286

10

+

278

7

-

280

10

+

279

6

-

278

10

-

279

5

-

278

9

-

278

4

-

277

8

-

279

3

-

278

7

-

278

2

-

278

6

-

277

1

-

278

5

-

 

 

 

277

4

-

 

 

 

278

3

-

 

 

 

278

2

-

 

 

 

277

1

-

 

 

 

Atmospheric pressure: 994.4 - 999.9 hPa

Atmospheric pressure: 993.9 hPa

Table 3:         Determination of third main test series using the fully automated apparatus ZT2

3rdMain test series

Temperature / °C

Droplets

Ignition

281

9

+

278

9

-

279

8

-

278

7

-

278

6

-

278

5

-

278

4

-

279

3

-

278

2

-

278

1

-

279

10

-

Atmospheric pressure: 999.9 hPa

The lowest temperatures at which an ignition occurred in the main test are given in Table 4.

Table 4:         Lowest temperatures at which an ignition occurred

Main test series

Lowest temperatures of an ignition

Highest temperatures without an ignition

Atmospheric Pressure

1

280 °C

278 °C

994.4 - 999.9 hPa

2

280 °C

279 °C

993.5 hPa

3

281 °C

279 °C

999.9 hPa

Conclusions:
The auto-ignition temperature of Spearmint spicata oil is 275°C measured at an atmospheric pressure from 993.5 to 999.9 hPa.
Executive summary:

The auto-ignition temperature of Spearmint spicata oil was determined according to EU Method A15 under GLP using a Cylindrical resistance furnace. The auto-ignition temperature was found to be 275°C at an atmospheric pressure from 993.5 to 999.9 hPa.

Description of key information

Self-ignition temperature: 275°C at atmospheric pressure 993.5-999.9hPa

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
275 °C

Additional information

The auto-ignition temperature of Spearmint oil was determined according to EU Method A15 under GLP using a Cylindrical resistance furnace. The auto-ignition temperature was found to be 275 °C at an atmospheric pressure from 993.5 to 999.9 hPa.