1-ethylazepan-2-one

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:

26 Mar - 19 Apr 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

adopted in March 04, 2016

Qualifier:

according to guideline

Guideline:

DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)

Version / remarks:

adopted in May 2003

GLP compliance:

yes

Specific details on test material used for the study:

Test item storage:
At room temperature protected from light

Auto-ignition temperature:

255 °C

Atm. press.:

>= 1 002 - <= 1 003 hPa

Preliminary Test

The estimated auto-ignition temperature was 255°C.

Main Study

The results of the main study on the determination of the auto-ignition temperature of the test item are given in Table 2.

Ignition of the test item within 5 minutes after introduction was observed with each sample volume and with each test a minimum auto-ignition temperature was obtained. The maximum deviation between values obtained in Test 1, Test 2 and Test 3 was > 10°C. Therefore Test 4 was performed. The maximum deviation between the values obtained in Test 1, Test 3 and Test 4 was < 10°C.

According to the guidelines, no further testing was required.

The lowest temperature at which ignition of the test item occurred was 257°C. This temperature was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test item of 255°C.

Table 2: Auto-ignition Temperature of the Test Item

Test	Volume	Auto-ignition temperature	Ignition delay	Colour of the flame	Minimum auto-ignition temperature
	[μL]	[°C]	[s]		[°C]
1	70	267	19	orange/blue	261
	150	261	21
	250	266	19
2^1	45	342	5	orange/blue	267
	50	267	15
	200	268	14
3	60	264	26	orange/blue	257
	100	257	27
	180	264	19
4	80	278	11	orange/blue	259
	125	259	24
	225	262	21

¹The maximum difference between values found in Test 1, Test 2 and Test 3 were >10 ⁰C therefore additional test was performed.

Conclusion

Commercially available auto-ignition temperature apparatus was used for the determination of the degree of auto-ignitability of N-ethylcaprolactam.

The test item is auto-ignitable with an auto-ignition temperature of 255°C.

The atmospheric pressure was 1002 and 1003 hPa.

Description of key information

255 °C at 1002 - 1003 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

255 °C