What is Methyl Radical? Methyl radical( .CH3) is an organic compound derived from methane(CH4 ) is the reaction intermediate that is highly reactive, short-lived and unstable. Methyl radical is also known as methyl free radical. Methyl Free Radical Formula: Methyl free radical is represented by .CH3 Methyl radical Formation: Homolytic cleavage between C-H bond inHow is methyl free radical formed- Organic Chemistry