Fatty acids, tallow, compds. with triethanolamine

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:

24 November 2015 to 6 September 2016

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))

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

350 °C

Atm. press.:

98.8 kPa

The auto-ignition temperature of the test material was found to be 350 ± 4 °C. The atmospheric pressure at the time of testing was 98.8 KPa.

Table 1: Auto-ignition Test Results

Injection Volume (µL)	Temperature (°C)	Runtime (seconds)	Ignition Time (seconds)	Observations
100	402	188	6	Two ignitions, white fumes
100	302	306	N/A	White fumes, no ignition
100	320	300	N/A	White fumes, no ignition
100	340	304	N/A	White fumes, no ignition
100	360	300	N/A	White fumes, no ignition
100	372	290	N/A	White fumes, no ignition
100	383	216	8	One ignition, white fumes
100	379	180	6	One ignition, white fumes
100	374	300	N/A	White fumes, no ignition
500	373	208	4	Nine ignitions, white fumes
500	366	246	16	Seven ignitions, white fumes
500	362	200	42	Five ignitions, white fumes
500	358	240	98	One ignition, white fumes
500	354	302	N/A	White fumes, no ignition
1000	354	318	108	Six ignitions, white fumes
1000	350	290	88	Four ignitions, white fumes
1000	346	318	N/A	White fumes, no ignition

N/A = no ignition

Conclusions:

Under the conditions of the study, the auto-ignition temperature of the test material was determined to be 350 ± 4 °C

Executive summary:

The auto flammability of the test material was investigated in a study which was performed under GLP conditions and in accordance with the standardised guidelines EU Method A.15.

The apparatus consisted of an insulated, round bottomed, wide necked flask contained within an oven. A recording thermocouple, coupled to a chart recorder, was fitted to monitor the temperature of the flask interior. The required volume (initially 100µL

) of test substance was injected as droplets with a pipette into the centre of the flask, taking care to avoid wetting the walls of the flask during injection. The pipette was then withdrawn and the chart recorder started. The time when any flash or flame was observed was read from the chart trace, or the test was run for at least five minutes. The procedure was repeated at different temperatures and with different sample volumes until the minimum value of the ignition temperature was obtained. Between each test, the flask was flushed completely with clean dry nitrogen, and after flushing, a sufficient time interval was allowed before the next sample was injected to ensure that the flask contents re-equilibrated with air, and were stabilised at the desired temperature. The tests were made in appropriate temperature steps until the lowest temperature at when ignition occurs had been determined. The atmospheric pressure at the time of testing was 98.9 kPa.

Under the conditions of the study, the auto-ignition temperature of the test material was determined to be 350 ± 4 °C.

Description of key information

Under the conditions of the study, the auto-ignition temperature of the test material was determined to be 350 ± 4 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

350 °C

Additional information

The auto flammability of the test material was investigated in a study which was performed under GLP conditions and in accordance with the standardised guidelines EU Method A.15. The study was assigned a reliability score of 1 in accordance with the criteria for assessing data quality set forth by Klimisch et al. (1997).

The apparatus consisted of an insulated, round bottomed, wide necked flask contained within an oven. A recording thermocouple, coupled to a chart recorder, was fitted to monitor the temperature of the flask interior. The required volume (initially 100µL

) of test substance was injected as droplets with a pipette into the centre of the flask, taking care to avoid wetting the walls of the flask during injection. The pipette was then withdrawn and the chart recorder started. The time when any flash or flame was observed was read from the chart trace, or the test was run for at least five minutes. The procedure was repeated at different temperatures and with different sample volumes until the minimum value of the ignition temperature was obtained. Between each test, the flask was flushed completely with clean dry nitrogen, and after flushing, a sufficient time interval was allowed before the next sample was injected to ensure that the flask contents re-equilibrated with air, and were stabilised at the desired temperature. The tests were made in appropriate temperature steps until the lowest temperature at when ignition occurs had been determined. The atmospheric pressure at the time of testing was 98.9 kPa.

Under the conditions of the study, the auto-ignition temperature of the test material was determined to be 350 ± 4 °C.