Essential oil of Boswellia carterii (Burseraceae) obtained from gum 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:

From 10th to 16th Feb 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

The study was conducted according to an internationally recognised method, and under GLP. The substance is considered to be adequately characterised with its purity. Therefore full validation applies.

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:

no

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Remarks:

inspected on 13 and 14 October 2014 / signed on 08 April 2015

Key result

Auto-ignition temperature:

245 °C

Atm. press.:

>= 97 875 - <= 101 303 Pa

Resultats

Table 4.12/1: Auto ignition temperature – results

Experiment	Value	Ignition delay	Drops used
First test series	248 °C	69 s	9
Second test series	251 °C	53 s	9
Third test series	248 °C	53 s	8

The lowest value of the auto ignition temperature is 248 °C. This value was determined using 8 drops test item. The test item showed auto ignition after 53 seconds.

The auto ignition temperature (result of determination) is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto ignition temperature is stated as 245 °C.

Validity

In the DIN, the following limits have to be applied to the range of the three lowest values which are used for evaluation. If the following demands are not fulfilled the test should be repeated and the higher temperature(s are preferably discarded for safety reasons:

Table 4.12/2: Acceptable ranges

Auto ignition temp.	Range
< 300 °C	difference between three values of the main test max. 10 K
> 300 °C	difference between three values of the main test max. 20 K

Considering that the three determinations were performed by one person and that the largest difference between measured ignition temperature was 3°C, the three lowest values of the main test lay within a range of 5°C, as required for auto ignition temperatures below 300 °C. Therefore the results are considered as valid.

Conclusions:

Auto-ignition temperature of the test item is stated as 245 °C.
This parameter/method is not relevant for classification, however the information is useful regarding potential additional fire hazard. No particular hazard is anticipated in normal conditions of storage.

Executive summary:

The study was conducted according to procedure and demands of EU-Method A.15 and DIN 51794.

The auto ignition temperature was determined in three independent determinations. The lowest value of the auto ignition temperature is 248 °C. This value was determined using 8 drops of test substance. The test substance showed auto ignition after 53 seconds. The auto ignition temperature is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C.

Therefore, the auto-ignition temperature of the test item is stated as 245 °C (97875 -101303 Pa).

Description of key information

No particular hazard is anticipated in normal conditions of storage. 

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

245 °C

Additional information

One non-GLP study was performed in order to determine the auto-ignition temperature of the test substance in compliance with the EU-Method A.15 and stardard DIN 51794 listed in EU A15. 

The auto ignition temperature was determined in three independent determinations.

The lowest auto-ignition temperature of the test item was determined to be 245°C in the main test. Due to safety reasons and according to the guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5.

The test substance has been determined to have an auto-ignition temperature of 245°C.