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Physical & Chemical properties

Auto flammability

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Description of key information

The experimentally determined  minimum ignition temperature (MIT) of non-stabilised Tetrafluoroethylene (TFE) = 240°C ± 5°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
240 K

Additional information

The Federal Institute for Materials Research and Testing, Berlin, Germany (BAM) (2005) determined the minimum ignition temperature (MIT) of non-stabilised Tetrafluoroethylene (TFE) = 240°C ± 5°C, according to Directive 67/548/EC, Annex A.5, method A.15.

This value is in close agreement with that obtained by ICI (1972) of 240 to 250°C.

Kiyama et al (1957) determined that the minimum explosion temperature for TFE-O2 mixtures was about 196°C, whatever the TFE ratio or the total pressure. In the case of TFE-air mixtures, the minimum explosion temperature was 222°C.

Yaws Chemical Properties Handbook (1999) gives an experimental auto-ignition temperature of 200°C, but without giving a TFE-specific reference.

The available data for the minimum ignition temperature of TFE are in close agreement, the most recent study by BAM (2005) being judged the most reliable. The MIT for TFE is 240 ± 5°C and the substance therefore can be classified into the temperature class T3 (MIT 200°C to 300°C).

Reference:

Kiyama R, Osugi J, Kusuhara S, 1957. Studies on explosive reactions of tetrafluoroethylene and acetylene with oxygen or air: Part 1. Explosive phenomena of gaseous tetrafluoroethylene or air mixtures. Review of Physical Chemistry of Japan 27(1), 24-36