It is mainly used for whitening of cellulose fiber fabrics and paper, brightening of light colored fabrics and whitening of pad printing. The dyeability of this product is similar to that of dyes. It can be promoted by salt, sodium sulfate, chemical book, etc. and delayed by leveling agent. The temperature is closely related to the time and degree of dyeing. This product has the advantages of low price, good affinity and high fluorescence intensity. It is widely used in industry. It is used as whitening agent for cotton fiber and pulp, as well as detergent, coating, plastic and other industries