4-butylresorcinol, is an active ingredient in a variety of cosmetics and can play a role in inhibiting melanin production. In recent years, a variety of phloroglucinol para derivatives (that is, containing phloroglucinol structure of the compound para presence of substituents) as whitening raw materials used in cosmetic formulations, re-arouse the enthusiasm of people. Among them,4-butylresorcinol is considered to be a very effective new whitening raw material.