... gas molecules. 2..Dedicated to the adsorption of formaldehyde, benzenes, ammonia, radon and other harmful gases ... can be able to sustain and efficiently absorb of formaldehyde, benzene, xylene, ammonia, radon and other harmful ... reach to about 40%. 3, Longer-lastingIndoor formaldehyde, benzene and other harmful gases act as the ... for food and pharmaceutical industries. favourable price of silica gel