Type A silica gel, also known as fine-pore silica gel, appears as transparent or semi-transparent particles. It is categorized into spherical and irregular block types. Its main component is SiO₂·nH₂O, which is insoluble in water and inorganic acids. It exhibits high mechanical strength and excellent wear resistance. Its internal structure features a pore volume of 0.35-0.45 ml/g, a pore diameter of 20-30 ?, and a specific surface area of ≥600 m²/g.

This product is an important adsorbent suitable for drying various industrial gases such as air, oxygen, hydrogen, and organic gases. It is also used for moisture protection in instruments, electrical appliances, textiles, food, pharmaceuticals, clothing, footwear, containers, and various other packaged items. Additionally, it is applied in the dehydration and purification of organic products and air humidity regulation. It adsorbs flammable and explosive gases like acetylene from compressed air. Its technical specifications are shown in the table: