Castor oil can undergo many chemical reactions through hydroxyl, double bond and ester bond, and the obtained products are widely used in coating industry, plastic industry, rubber industry, building materials industry, metal industry and machinery industry.

A variety of products can be obtained by treating castor oil under different hydrogenation conditions, so castor oil is widely used in various industrial sectors.

The content of unsaponifiable matter in castor oil is less than 65438 0%, and the vitamin content is low (about 0.05). Castor seed contains high oil content. Because of the different uses of oil, the extraction methods of oil are different. Medicinal castor oil is cold pressed by hydraulic press at a temperature not exceeding 50℃, otherwise some impurities will dissolve in the oil and cannot be used as medicine.