3,7-dimethylocta-1,6-diene

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-flammability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From June 18 to 21, 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well described study in accordance with GLP and EU-Method A.15 without any deviation

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Auto-ignition temperature:

280 °C

Atm. press.:

99 049 Pa

Remarks on result:

other: Experiment 1: Ignition delay: 7 seconds

Auto-ignition temperature:

285 °C

Atm. press.:

98 936 Pa

Remarks on result:

other: Experiment 2: Ignition delay: 5 seconds

Auto-ignition temperature:

285 °C

Atm. press.:

99 729 Pa

Remarks on result:

other: Experiment 3: Ignition delay: 6 seconds

Preliminary test: Strong fuming and sizzle was observed at temperatures above 270 °C. At the highest temperature, one pop (taken as sign of ignition) could be perceived. Atmospheric pressure during the pre-test was 98998.

 

Table 1: Pre-Test: Ignition attempts

 

Time	Temperature(Channel 0)	Temperature(Channel 1)	Drops used	Ignition?	Ignition Delay	Observations
	^oC	^oC	#	yes/no	seconds
09.^19	249	249	3	no	--	weak fuming
09.^30	272	273	3	no	--	sizzle, strong fuming
09.^46	291	291	3	yes	3	sizzle, pop, flame fume

 

Main test: Auto ignition temperatures during test 1, 2 and 3 were observed to be 280, 285 and 285 °C at 99049, 98936 and 99729 Pa, respectively.

 

Table 2: Main study: Experiment 1

 

Time	Temperature(Channel 0)	Temperature(Channel 1)	Drops used	Ignition?	Ignition Delay	Observations
	^oC	^oC	#	yes/no	seconds
9.^56	285	285	3	yes	5	sizzle, pop, flame, fume
10.^00	280	280	3	yes	7	sizzle, pop, flame, fume
10.^04	275	275	3	no	--	sizzle, weak fuming
10.^11	275	275	5	no	--	sizzle, weak fuming
10.^19	276	274	7	no	--	sizzle, weak fuming
10.^28	278	276	7	no	--	sizzle, weak fuming

 

Table 3:Main study: Experiment 2

 

Time	Temperature(Channel 0)	Temperature(Channel 1)	Drops used	Ignition?	Ignition Delay	Observations
	^oC	^oC	#	yes/no	seconds
13.^29	276	274	3	no	--	sizzle, strong fuming
13.^55	279	280	3	no	--	sizzle, strong fuming
14.^04	279	280	5	no	--	sizzle, strong fuming
14.^12	285	285	3	yes	5	sizzle, pop, flame, fume
14.^19	279	281	7	no	--	sizzle, strong fuming
14.^27	281	282	7	no	--	sizzle, strong fuming

 

Table 4: Main study: Experiment 3

 

Time	Temperature(Channel 0)	Temperature(Channel 1)	Drops used	Ignition?	Ignition Delay	Observations
	^oC	^oC	#	yes/no	seconds
15.^38	279	281	3	no	--	sizzle, strong fuming
15.^47	284	286	3	yes	6	sizzle, pop, flame, fume
15.^52	279	281	5	no	--	sizzle, strong fuming
16.^00	279	281	7	no	--	sizzle, strong fuming
16.^10	281	283	7	no	--	sizzle, strong fuming

Conclusions:

Under the test conditions, the auto ignition temperature of dimethyloctadiene was determined to be 280 °C.

Executive summary:

A GLP study was conducted to determine the auto flammability of dimethyloctadiene according to EU Method A.15. In the preliminary test, strong fuming and sizzle were observed at temperatures above 270 °C at 98998 Pa. In the main test, auto ignition temperatures during test 1, 2 and 3 were observed to be 280, 285 and 285 °C at 99049, 98936 and 99729 Pa, respectively.

 

Under the test conditions, the auto ignition temperature of dimethyloctadiene was determined to be 280 °C.

Description of key information

 Under the test conditions, the auto ignition temperature of DIMETHYLOCTADIENE was determined to be 280 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

280 °C

Additional information

Key study well described conducted in accordance with GLP and EU-Method A.15 without any deviation. Therefore the result of this key study may be used as the end point value.