C型硅胶又称粗孔硅胶，为乳白色半透明颗粒。分为球形和块状两类。主要成分为SiO2·nH2O，不溶于水和无机酸。其内部结构为孔容0.78-1.00ml/g，孔径80-100Å，比表面积300-500m2/g。

Type C silica gel, also known as coarse porous silica gel, It is a milky translucent particle. It is divided into two types: spherical and block. The main component is SiO2·nH2O, insoluble in water and inorganic acid, soluble in hydrofluoric acid and concentrated caustic soda solution. The pore volume is 0.78-1.00ml/g, pore size 80-100Å, specific surface area 300-500㎡/g.

本品主要用于干燥各种工业气体，吸附变压器油中的有机酸和水分、工业发酵过程中的高分子蛋白，水中多价有害元素等，药物提纯和分离，物品防潮以及饲养宠物的垫料，催化剂载体，也是进一步加工精细硅胶系列产品的基础原料。

The product is mainly used for drying various industrial gases, adsorption of organic acids and moisture in transber oil, polymer protein in industrial fermentation process, multi-valuable harmful elements in water, etc., purification and separation of drugs, moisture-proof items and pet feeding pad, catalyst carrier, and also the basic raw materials for further processing of fine silica gel products.