Essential oil of Spearmint obtained from the aerial part of Mentha spicata and/or Mentha cardiaca (Lamiaceae) obtained by distillation

Auto flammability

Link to relevant study record(s)

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 for cross-reference:

reference to same 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 51794 (2003): Determination of Ignition Temperature

Deviations:

no

Principles of method if other than guideline:

Not relevant

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

spearmint oil
Spearmint, ext. (Mentha spicata L.)
EC 283-656-2
CAS 84696-51-5
Oil of spearmint - Native type
Oil of spearmint - Indian type

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

1^stMain test series			2^ndMain 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

3^rdMain 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.