4-tert-butylphenol is used in pesticides for the synthesis of the acaricide imidacloprid and is also a raw material for the new fungicide spiroxamine. It has antioxidant properties and can be used as a stabilizer for rubber, soap, chlorinated hydrocarbons, and nitrocellulose. It is a raw material for pharmaceuticals (insect repellents), fragrances, synthetic resins, and an additive for softeners, solvents, dyes, and coatings. It is also used as a stabilizer for polyvinyl chloride, surfactant, UV absorber, etc.