A型硅胶又称细孔硅胶，为透明、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。机械强度高，耐磨性好。其内部结构为孔容0.35-0.5ml/g，孔径20-40Å，比表面积≥600㎡/g。

Type A silica gel also known as Narrow pore silica gel, is transparent and translucent particles. 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. High mechanical strength, good wear resistance. The pore volume is 0.35-0.5ml/g, pore size 20-40Å, specific surface area ≥600㎡/g.  

本品是一种重要的吸附剂，适用于干燥各种工业气体，如空气、氧气、氢气和有机气体，以及仪器仪表、电器、纺织品、食品、药品、服装、鞋帽、集装箱及其它各种包装物品防潮，有机产品脱水精制及空气湿度调节等方面。从压缩空气中吸附乙炔等易燃易爆气体。

The product is an important adsorbent, suitable for drying all kinds of industrial gases, such as air, oxygen, hydrogen and organic gases, as well as instruments, electrical appliances, textiles, food, medicine, clothing, shoes and hats, containers and other kinds of packaging items moisture-proof, organic products dewatering and refining and air humidity regulation. Adsorption of flammable and explosive gases such as acetylene from compressed air.