Silica gel; industrial chemicals;chemical substances for analyses in laboratories, other than for medical or veterinary purposes; synthetic resins, unprocessed; organic silicone; bleaching preparations for industrial purposes;decolorants for industrial purposes; Chemical preparations in the nature of filtering materials in water purification; chemicals for use in purification of water; Chemical preparations in the nature of ion-exchange resins; Chemical preparations in the nature of ion-exchange resins, namely, hydronium exchange resin