Method for producing tetrafluoromethane

A method for producing tetrafluoromethane, the method comprising:

• introducing fluorine gas to a raw material liquid containing a reaction inducer and a fluorinated hydrocarbon represented by chemical formula CpHqClrFs (in the chemical formula, p is an integer of 3 or more and 18 or less, q is an integer of 0 or more and 3 or less, r is an integer of 0 or more and 9 or less, and s is an integer of 5 or more and 30 or less) and having no carbon-carbon unsaturated bond,
• wherein the reaction inducer is a halogen-containing carbon compound liquid at room temperature and pressure and is reacted with the fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas, and
• the reaction inducer is contained at a content of more than 0% by mass and not more than 10% by mass when a total content of the fluorinated hydrocarbon and the reaction inducer contained in the raw material liquid is 100% by mass.