Oligomerisation products of plasma treated triglycerides, C16-18 (even numbered) and C18 (unsaturated)

Auto flammability

Administrative data

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Report date:

2019

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Version / remarks:

May 2008 (referring to DIN 51794)

Deviations:

yes

Remarks:

Only uncritical deviations: apparatus refers to DIN 14522 and uses smaller temperature steps.

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

vegetable oil mono- and polyunsaturated C16-C22 triglycerides

Molecular formula:

C51H92O6 to C69H128O6

IUPAC Name:

vegetable oil mono- and polyunsaturated C16-C22 triglycerides

Constituent 2

Reference substance name:

dimers of vegetable oil mono- and polyunsaturated C16-C22 triglycerides

Molecular formula:

C102H186O12 to C138H256O12

IUPAC Name:

dimers of vegetable oil mono- and polyunsaturated C16-C22 triglycerides

Constituent 3

Reference substance name:

trimers of vegetable oil mono- and polyunsaturated C16-C22 triglycerides

Molecular formula:

C153H280O18 to C207H388O18

IUPAC Name:

trimers of vegetable oil mono- and polyunsaturated C16-C22 triglycerides

Constituent 4

Reference substance name:

tetramers and higher oligomers of vegetable oil mono- and polyunsaturated C16-C22

Molecular formula:

C204H374O24 and higher oligomers

IUPAC Name:

tetramers and higher oligomers of vegetable oil mono- and polyunsaturated C16-C22

Test material form:

liquid: viscous

Results and discussion

Auto-ignition temperature (liquids / gases)

Key result

Auto-ignition temperature:

410 °C

Atm. press.:

996.8 mBar

Any other information on results incl. tables

Pre-test 1

Selected T	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	yes/no
200	200.6	5	no	-
300	300.2	5	no	Smoke
400	400.3	5	no	Smoke
500	500.3	5	yes	Plop

Pre-test 2

Selected T*		T Vessel	Drops used	Ignition?	Observations
°C		°C	#	yes/no
400		400.1	5	no	Smoke
420		420.4	5	yes	Flame and plop
Result given by the instrument
-	422.14		5	yes after 31 seconds	Flame and plop

Main test

First test series

Selected T	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	yes/no
427.1	427.0	5	yes	Flame and plop
422.1	422.2	5	yes	Flame and plop
417.1	417.4	5	no	Smoke
417.1	417.3	7	yes	Flame and plop
415.1	415.1	7	yes	Flame and plop
413.1	413.0	7	yes	Flame and plop
411.1	411.1	7	no	Smoke
411.1	411.0	9	no	Smoke
411.1	411.2	13	no	Smoke
411.1	410.8	5	no	Smoke
Result given by the instrument
-	413.94	7	yes after 42 seconds	Flame and plop

Second test series

Selected T	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	yes/no
433.9	433.6	5	yes	Flame and plop
428.9	428.7	5	yes	Flame and plop
423.9	423.8	5	yes	Flame and plop
418.9	419.0	5	no	smoke
418.9	418.9	7	no	smoke
418.9	419.2	9	yes	Flame and plop
416.9	416.8	9	no	smoke
416.9	417.0	13	no	smoke
416.9	416.9	5	no	smoke
416.9	417.1	7	no	smoke
Result given by the instrument
-	419.27	9	yes after 28 seconds	Flame and plop

Third test series

Selected T	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	yes/no
439.3	439.2	5	yes	Flame and plop
434.3	434.2	5	yes	Flame and plop
429.3	429.3	5	yes	Flame and plop
424.3	424.6	5	yes	Flame and plop
419.3	419.3	5	yes	Flame and plop
414.3	414.1	5	yes	Flame and plop
409.3	409.4	5	no	smoke
409.3	409.4	7	no	smoke
409.3	409.1	9	no	smoke
409.3	409.5	13	no	smoke
411.7	411.7	5	no	smoke
411.7	411.6	7	no	smoke
411.7	411.8	9	no	smoke
411.7	411.9	13	no	smoke
Result given by the instrument
-	413.73	5	yes after 17 seconds	Flame and plop

Validity control The requirements for repeatability of the DIN standard are stated as follows: Three lowest values of the main test have to lie within a range of 10 K (if auto ignition temperature is above 300 °C). The three lowest values of the main test lay within a range of 10 K (as required for auto ignition temperatures above 300 C). The largest difference between measured ignition temperatures was 5 K. The test has therefore passed the validity criterium.

Interpretation of the results

Experiment	Value (rounded to integer)	Ignition delay	Drops used
First test series	414 °C	42 s	7
Second test series	419 °C	28 s	9
Third test series	414 °C	17 s	5

The lowest value of the auto ignition temperature is 414 °C. This value was determined using 5 respectively 7 drops of test item. The test item showed auto ignition after 17 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 410 °C.

Applicant's summary and conclusion

Conclusions:

Auto-ignition temperature: 410°C.

Executive summary:

The auto ignition temperature was determined in three independent determinations. A lowest value of the main test of 414 °C was found. Therefore, the auto-ignition temperature according to EU A.15 (rounded down to a whole multiple of 5 °C) of the test item 'Oligomerisation product obtained by plasma treatment of vegetable oil mono- and polyunsaturated C16-C22 triglycerides' is stated as 410°C.