Laccase is an extracellular multicopper enzyme. It oxidizes aromatic and nonaromatic compounds. Various compounds are used for detecting laccase production. These include guaiacol, syringaldazine and polymeric dyes like remazol brilliant blue-R. Laccase is involved in lignin degradation and thereby has industrial as well as food applications. It is commonly used for delignification, dye bleaching, paper processing, waste detoxification, textile dye transformation, plant fiber modification and ethanol production.