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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11 Mar 2020 - 23 Apr 2020
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:
Council Regulation 440/2008, 30 May 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: Deutsches Institut für Normung (DIN) Guide 51794: Determining the Ignition Temperature of Petroleum Products.
Version / remarks:
May 2003
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Specific details on test material used for the study:
Physical Description: Colourless to pale yellow liquid (determined by Charles River Den Bosch)
Purity/Composition: 96.27%
Storage Conditions: At room temperature
Purity/Composition correction factor: No correction factor required
Test item handling: No specific handling conditions required
Chemical name: 2-Ethylhexyl 2-([1,1'-biphenyl]-4-ylcarbonyl)benzoate
CAS number: 75005-95-7
EC Number: 278-051-5
Molecular formula: C28H30O3
Molecular weight: 414.22
Auto-ignition temperature:
420 °C
Atm. press.:
> 1 019 - < 1 024 hPa

Preliminary Test

The estimated auto-ignition temperature was 450°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 7.

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 the three values was < 20°C. According to the guidelines, no further testing was required.

The lowest temperature at which ignition of the test item occurred was 424°C. This temperature was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test item of 420°C.

Table 7       Auto-ignition Temperature of the Test Item

Test Volume [μL] Auto-ignition temperature [°C] Ignition delay [s] Colour of the flame Minimum auto-ignition temperature [°C]
1 70 456 15 yellow/orange 426
150 435 17 yellow/orange
250 434 11 yellow/orange
500 429 12 yellow/orange
800 426 12 yellow/orange
1000 429 17 yellow/orange
2 50 451 11 yellow/orange 424
700 424 15 yellow/orange
950 427 13 yellow/orange
3 60 460 12 yellow/orange 428
650 428 11 yellow/orange
975 429 12 yellow/orange
Conclusions:
Commercially available auto-ignition temperature apparatus was used for the determination of the degree of auto-ignitability of the test item.
The test item is auto-ignitable with an auto-ignition temperature of 420°C.
The atmospheric pressure was 1019 and 1024 hPa.
Executive summary:

In this guideline (EU A.15) study, conducted with GLP certification, the test item is auto-ignitable with an auto-ignition temperature of 420°C. at 1013 hPa.

Description of key information

Study conducted to recognised testing guidelines [with GLP certification].

Key value for chemical safety assessment

Additional information