Silica Gel By Brasglobalchems

A-type silica gel is also called porous silica gel, including spherical silica gel, semi-spherical silica gel and block silica gel, the appearance is transparent or translucent glass, there are white, blue and orange, blue silicone will become pink after water absorption, orange silicone will become green after water absorption, can be used as A drying indicator.
B-type silica gel is translucent particles, divided into spherical and massive two kinds, the main component is SiO2.nH2O,insoluble in water and inorganic acid, high mechanical strength, good wear resistance, B-type silica gel between coarse pores and fine pores. The pore volume is 0.60-0.80mL/g, the average pore size is 4.0-7.0nm, and the specific surface area is 450-650 m2/g.
C-type silica gel is a milky translucent particle, with a multi-microporous structure, and also becomes a coarse porous silica gel, which is divided into spherical and massive two categories, and its internal structure pore volume is 0.78-1.00mL/g, the pore size is 8-10nm, and the specific surface area is 350-500m2/g.