Registration Dossier

Administrative data

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

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
adopted in March 04, 2016
Qualifier:
according to
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
adopted in May 2003
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid
Specific details on test material used for the study:
Test item storage:
At room temperature protected from light

Results and discussion

Auto-ignition temperature (liquids / gases)
Auto-ignition temperature:
255 °C
Atm. press.:
>= 1 002 - <= 1 003 hPa

Any other information on results incl. tables

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

 

 

21

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.

Applicant's summary and conclusion