Propane Characteristics
Synonyms Dimethyl methane, Propyl hydride
CAS No. 74-98-6
Chemical formula C3H8
Vapour density 1.56 (air = 1)
Safe Work Australia ES TWA Simple asphyxiant
STEL ---
Flammable limits LEL 1.7 % by volume
UEL 10.9 % by volume
Equipment group IIA
Temperature classification T2
Chemical/physical properties Propane at room temperature is a colourless gas, odourless when pure but is invariably mixed with other hydrocarbon gases (e.g. with butane in LPG) and sulphur-containing odourants to render it detectable by smell. It is highly flammable with an ignition temperature of 450 °C.
Hazardous properties Propane is mildly anaesthetic and slightly irritating to the mucous membranes but its main hazards are its flammability and the risk of oxygen displacement if a large enough volume leaks into a confined space.
Occurrence/Uses Propane occurs in natural gas and is a component of LPG (liquid petroleum gas) used for domestic heating and cooking.
Detectors available Catalytic bead (0 – 100 % LEL)
Gas detector tube (0.02 – 0.5 % by volume)
Suggested alarm levels Lo: 5 % LEL (850 ppm
Hi: 10 % LEL (1,700 ppm)


NEW | SKC Chek-Mate Air Sample Pump Calibrator

The latest Air Sample Pump Calibrator from SKC Inc.

Learn More

Product Catalogue

Click here to download the latest Air-Met Product Catalogue. To receive a printed copy, please contact Air-Met today.

Book a Service Job

Instruments due for a service?

Book a Service Job