Methane, (CH4)

Geiger counters and X Ray Fluorescence detectors make use of methane when used in combination with argon. Methane, (CH4) CAS #74-82-8 UN1971; UN1972, can also be put into a mixture with hydrocarbons when looking for the PCI of coal or hydrocarbons. In this use, it is a reference point for measurements that are calorimetric. Other uses of methane include calibration, monitoring, and analyzing in various petrochemical and environmental industries.