Arbutin is a hydroquinone glycoside compound, its chemical name is 4-Hydroquinone-alpha-D-glucopyranoside (4-Hydroquinone-alpha-D-glucopyranoside), which exists in plants such as bearberry and bilberry. It is a natural whitening active substance emerging that is non-irritating, non-allergenic and compatible. There are two structural and functional functional groups in the molecular structure of arbutin: one is glucose residue; the other is phenolic hydroxyl group. The physical state of �±-arbutin is white to light gray powder, which is easily soluble in water and ethanol.