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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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Physical & Chemical properties

Auto flammability

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auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
according to guideline
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
NF T 20-037
GLP compliance:
Key result
Auto-ignition temperature:
275 °C
Atm. press.:
999 mBar

The measurements were carried out over many days. The chronologically observed phenomena, as well as the room temperature and atmospheric pressure, are listed in the following table attached (see attached background material).

The Auto-Ignition temperature measured for heptanoic acid was 275°C ± 5°C.
Executive summary:

The Auto-Ignition temperature of n-heptanoic acid was determinated in compliance with Commission Regulation (EC) No 440/2008 , part A.15 Auto-Ignition Temperature (Liquids and gases) according to NF T 20-037.

The auto-ignition temperature is the lowest temperature at which the substance will ignite when mixed with air under the conditions defined in the test method. The test has been done between the following temperatures: 390 -270°C. The Auto-Ignition temperature measured for n-heptanoic acid was 275°C ± 5°C at room temperature (18 -23°C) and at 999 mBar.

Description of key information

275°C at 999 mBar

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
275 °C

Additional information

An experimental study compliant with the Commission Regulation (EC) No 440/2008 , part A.15 (NF T 20-037) selected as the Key Study, showed that the self ignition temperature of heptanoic acid was 275°C at 999 mBar.