... harmful gas molecules. 2..Dedicated to the adsorption of formaldehyde, benzenes, ammonia, radon and other harmful ... other harmful gases indoors. Meanwhile it owns of removing away of mildew smell, deodorize and sterilize. For the ... coatings and resin production or in the field of preservation. 2, Strong efficacyAs to a highly ... for food and pharmaceutical industries. favourable price of silica gel