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EC number: 203-626-4 | CAS number: 108-89-4
Auto flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- auto-ignition temperature (liquids)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 06.09.2022 to 09.09.2022
- 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
- Qualifier:
- according to guideline
- Guideline:
- DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Key result
- Auto-ignition temperature:
- 595 °C
- Atm. press.:
- >= 1 009 - <= 1 021 hPa
- Conclusions:
- The auto flammability of the test item is 595ºC according to EU method A.15 criteria.
- Executive summary:
The determination of the auto flammability of the test item was performed according to EU Method A.15 (GLP study). About 200 mL of sample are introduce into an opened Erlenmeyer’s flask. Series of ignition trials were performed by changing the temperature of the chamber walls and amount of a sample, and searching for the lowest temperature in which an ignition appears. The auto flammability of the test item was determined to be 595ºC with atmospheric pressure ranging from 1009 to 1021 hPa.
Reference
Determination of the preliminary initial temperature for the main determination (T1)
The approximate auto-ignition temperature of the test item is above 500 °C, therefore the ignition chamber heated up to the temperature about 60 °C below predicted temperature of the auto-ignition with the rate of (3 - 5) °C/min. The test was started at 440 °C. Five drops of liquid were introduced into the ignition chamber during the increase of temperature at intervals of about 20 °C. When any such attempt it was determined whether there was auto-ignition at the time of 3 minutes. The temperature at which the auto-ignition was observed for the first time, was the initial temperature for the main test (T1). The initial temperature for the main test (T1) is: 620 °C.
Main determination – The lowest value from the first series (T2, T3)
Stage I: Determination of temperature T2
Table 1. Results of determination of the lowest temperature from the first series – T2
Temperature of oven [°C] | V [quantity of drops] | Result of test | Corresponding delay time [s] |
615 | 5 | + | 100 |
610 | 5 | + | 93 |
605 | 5 | - | - |
605 | 6 | - | - |
605 | 7 | + | 118 |
600 | 5 | - | - |
600 | 6 | - | - |
600 | 7 | - | - |
600 | 8 | - | - |
600 | 9 | - | - |
600 | 10 | - | - |
After including a thermometer deviation: T2 = 601 °C
Stage II: Determination of temperature T3:
Table 2. Results of determination of the lowest temperature from the first series – T3
Temperature of oven [°C] | V [quantity of drops] | Result of test | Corresponding delay time [s] |
603 | 5 | + | 86 |
601 | 5 | + | 94 |
599 | 5 | + | 79 |
577 | 5 | - | - |
577 | 6 | - | - |
577 | 7 | - | - |
577 | 8 | - | - |
577 | 9 | - | - |
577 | 10 | - | - |
After including a thermometer deviation: T3 = 595 °C
The lowest (final) value from the main determination (T4)
Table 3. Results of determination of the final temperature – T4
Temperature of oven [°C] | V [quantity of drops] | Result of test | Corresponding delay time [s] |
604 | 5 | - | - |
604 | 6 | - | - |
604 | 7 | - | - |
604 | 8 | - | - |
604 | 9 | - | - |
604 | 10 | - | - |
606 | 5 | + | 84 |
After including a thermometer deviation: T4 = 602 °C
Repeating of determination (T5)
Table 4. Results of repeating of determination – T5
Temperature of oven [°C] | V [quantity of drops] | Result of test | Corresponding delay time [s] |
604 | 5 | + | 90 |
602 | 5 | - | - |
602 | 6 | - | - |
602 | 7 | + | 123 |
600 | 5 | + | 87 |
598 | 5 | - | - |
598 | 6 | - | - |
598 | 7 | - | - |
598 | 8 | - | - |
598 | 9 | - | - |
598 | 10 | - | - |
After including a thermometer deviation: T5 = 596 °C
Table 5. Results of determination of auto-ignition temperature
Stage of determination | Auto-ignition temperature [°C] | V | Corresponding delay time [s] |
The lowest value from first series of tests (T3) | 595 | 5 | 79 |
The lowest value from main determination (T4) | 602 | 5 | 84 |
The lowest value from first repeating (T5) | 596 | 5 | 87 |
The lowest experimental value of auto-ignition temperature | 595 | 5 | 79 |
Auto-ignition temperature according to | 595 | - | - |
Description of key information
Key study. Test method according to EU Method A.15, GLP study. The auto flammability of the test item is 595ºC (1009 to 1021 hPa).
Key value for chemical safety assessment
- Autoflammability / Self-ignition temperature at 101 325 Pa:
- 595 °C
Additional information
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