7-methyl-3-methyleneocta-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 17 to 23, 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Well described study conducted 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

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Auto-ignition temperature:

265 °C

Atm. press.:

100 248 Pa

Remarks on result:

other: Experiment 1: Ignition delay: 12 seconds

Auto-ignition temperature:

260 °C

Atm. press.:

100 129 Pa

Remarks on result:

other: Experiment 2: Ignition delay: 12 seconds

Auto-ignition temperature:

259 °C

Atm. press.:

10 089 Pa

Remarks on result:

other: Experiment 3: Ignition delay: 22 seconds

Key result

Auto-ignition temperature:

255 °C

Remarks on result:

other: Final value

Preliminary test: Sizzle was observed at temperatures above 251 °C. At the highest temperature, sizzle, flame, fume and one pop (taken as sign of ignition) could be perceived. Atmospheric pressure during the pre-test was 99353 Pa.

Table 1: Pre-test: Ignition attempts

 

Time	Temperature (Channel 0)	Temperature (Channel 1)	Drops used	Ignition?	Ignition Delay	Observations
	^oC	^oC	#	yes/no	seconds
15.^26	252	250	3	no	--	sizzle
15.^30	270	268	3	yes	13	sizzle, pop, flame, fume

 

 

Main test: Auto ignition temperatures during test 1, 2 and 3 were observed to be 265, 260 and 259 °C at 100248, 100129 and 10089 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.^02	265	263	3	no	--	sizzle
9.^21	270	269	3	no	--	sizzle, fume
9.^37	274	273	3	no		sizzle, fume
10.^01	281	282	3	yes	9	sizzle, fume, flame, pop
10.^28	275	276	5	no	--	sizzle, fume
10.^36	275	275	6	yes	4	sizzle, fume, flame, pop
10.^50	270	270	6	yes	9	sizzle, fume, flame, pop
11.^45	265	265	6	yes	12	sizzle, fume, flame, pop
11.^51	260	261	6	no	--	sizzle, fume
12.^12	258	260	8	no	--	sizzle, fume
12.^18	258	260	10	no	--	sizzle, fume
12.^31	260	262	10	no	--	sizzle, fume

 

Table 3: Main study: Experiment 2

 

Time	Temperature (Channel 0)	Temperature (Channel 1)	Drops used	Ignition?	Ignition Delay	Observations
	^oC	^oC	#	yes/no	seconds
14.^23	261	260	6	no	--	fume, sizzle
15.^14	265	265	6	no	--	fume, sizzle
15.^28	271	270	6	yes	7	fume, sizzle, flame, pop
15.^42	267	265	8	no	--	fume, sizzle
16.^13	265	266	10	yes	8	fume, sizzle, flame, pop
16.^32	261	259	10	yes	12	fume, sizzle, flame, pop
16.^44	256	254	10	no		fume, sizzle
16.^50	255	254	12	no	--	fume, sizzle
16.^58	258	256	12	no	--	fume, sizzle

 

Table 4: Main study: Experiment 3

 

Time	Temperature (Channel 0)	Temperature (Channel 1)	Drops used	Ignition?	Ignition Delay	Observations
	^oC	^oC	#	yes/no	seconds
8.^59	256	256	10	no	--	sizzle, fume
9.^13	259	260	10	no	--	sizzle, fume
9.^34	265	265	10	no	--	sizzle, fume
9.^54	270	269	10	no	--	sizzle, fume
10.^08	274	275	10	yes	9	sizzle, pop, flame fume
10.^16	271	269	12	no	--	sizzle, fume
10.^24	271	269	14	no	--	sizzle, fume
10.^33	271	269	16	no	--	sizzle, fume
10.^42	271	269	8	yes	11	sizzle, pop, flame
10.^49	266	264	8	yes	15	sizzle, pop, flame
11.^01	260	258	8	yes	22	sizzle, pop, flame
11.^10	256	254	8	no	--	sizzle, fume
11.^18	256	255	10	no	--	sizzle, fume
11.^28	256	255	6	no	--	sizzle, fume
11.^36	256	255	12	no	--	sizzle, fume
11.^49	258	256	12	no	--	sizzle, fume

Conclusions:

The auto ignition temperature of myrcene was determined to be 255 °C.

Executive summary:

A GLP study was conducted to determine the auto flammability of myrcene (CAS No. 123-35-3) according to EU Method A.15. In the preliminary test, sizzle was observed at temperatures above 251 °C at 99353 Pa. In the main test, auto ignition temperatures during test 1, 2 and 3 were determined to be 265, 260 and 259 °C at 100248, 100129 and 10089 Pa, respectively.

 

Therefore, the auto ignition temperature of myrcene was determined to be 255 °C.

Description of key information

The auto ignition temperature of MYRCENE was determined to be 255°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

255 °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 for auto-ignition temperature.