Tags: Chemical Compound, Chemical Substance.
Thiophosphoryl fluoride is an inorganic molecular gas with formula PSF3 containing phosphorus sulfur and fluorine. It spontaneously ignites in air and burns with a cool flame. The discoverers were able to have flames around their hands without discomfort and called it probably one of the coldest flames known. The gas was discovered in 1888.It is useless for chemical warfare as it burns immediately and is not toxic enough.
