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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
Study period:
May - September 2017
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))
GLP compliance:
yes (incl. QA statement)
Specific details on test material used for the study:
Batch number: 83100001
Purity: 91.1%
Physical state/appearance: Clear colourless liquid
Expiry date: 11 May 2018
Storage conditions: Room temperature (nominally 15 to 25°C), dark
Key result
Auto-ignition temperature:
254 °C
Atm. press.:
> 1 007 - < 1 015 Bar

Table 1. Results of Autoignition Test

Test temperature (°C)

 Test volume (µL)  Time (s)  Observation
 400  70  1 Yellow flame 
 300  70  4  Yellow flame
 280  70  16  Yellow flame
 270  70  >300  No ignition
 270  1000  >300  No ignition
 276  70  >300  No ignition
 276  1000 >300   No ignition
 278  70  >300  No ignition
 278  1000  >300  No ignition
 278  100 12  Yellow flame
 276  100  21  Yellow flame
 274  100 20   Yellow flame
 272  100  19  Yellow flame
 270  100  20  Yellow flame
 268  100  >300  No ignition
 268  200  15  Yellow flame
 266  200 16   Yellow flame
 260  200  18  Yellow flame
 258  200  18  Yellow flame
 256  200  >300  No ignition
 256  500  27  Yellow flame
 254  500  >300  No ignition
 254  70  >300  No ignition
 254  1000  >300  No ignition
 254  100  >300  No ignition
 254  200  >300  No ignition
 254  500  26  Yellow flame
 252  500  >300  No ignition
 252  500  >300  No ignition
 252  500  >300  No ignition
 252  500 >300  No ignition 
 252  500  >300  No ignition
 252  500  >300  No ignition
 252  70  >300   No ignition
 252  100  >300  No ignition
 252  200  >300  No ignition 
 252  1000  >300  No ignition
Conclusions:
The auto-ignition temperature of alpha-terpinene was determined to be 254°C.
Executive summary:

The auto-ignition temperature of alpha-terpinene was tested according to EC Method A.15. The auto-ignition temperature of alpha-terpinene was determined to be 254°C.

Description of key information

Key study: Test method according to EU Method A.15, GLP study. The auto-ignition temperature of alpha-terpinene was determined to be 254°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
254 °C

Additional information