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Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: IEC 60079-20-1, Section 7, Method of test for auto-ignition temperature
Deviations:
yes
Remarks:
5 °C temperature increments rather than the specified 2 °C increments
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
605 °C
Atm. press.:
>= 754 - <= 763 mm Hg
Remarks on result:
other: ± 30 °C

Table 1: Auto-ignition temperature - summary of results

Test temperature (°C)

Sample quantity (µL)

Ignition delay (s)

Result

605

70

6 – 7

Ignition

600

50

>300

No ignition

600

70

>300

No ignition

600

100

>300

No ignition

600

150

>300

No ignition

600

200

>300

No ignition

Conclusions:
The auto-ignition temperature of the substance was determined to be 605 ± 30 °C.
Executive summary:

The auto-ignition temperature of the substance was tested under GLP in accordance with standard IEC 60079 -20 -1, Section 7, "Method of Test for Auto-Ignition Temperature", but with 5 °C temperature increments rather than the specified 2 °C increments. The test was carried out with a 200 mL Erlenmeyer flask of borosilicate glass, which was enclosed within a cylindrical furnace that could maintain the surfaces of the flask at a uniform, constant temperature. Surface temperature was monitored by means of thermocouples. A known quantity of test substance was added to the flask, the interior of which was then observed for signs of vapour ignition. The delay time from the addition of test substance to an ignition was recorded. The test was carried out at 20 - 21 °C at 754 to 763 mm Hg atmospheric pressure. No ignition occured at 600 °C with varous sample quantities tested. An ignition was observed at 605 °C with an injection volume of 70 µL and a delay time of 6 - 7 seconds. The auto-ignition temperature of the substance was determined to be 605 ± 30 °C.

Description of key information

Auto-ignition = 605 °C (IEC 60079-20-1, GLP)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
605 °C

Additional information

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