CHEMICALS USED IN MANUFACTURE OF PAPER; CHEMICAL OXIDANTS FOR USE IN THE MANUFACTURE OF PRINTED CIRCUITS; CHEMICAL VEHICLES USED IN THE MANUFACTURE OF PAINTS; DIATOMACEOUS EARTH FOR USE AS A PLASTIC FILLER, CHEMICAL CARRIER, RESIN ADMIXTURE; CHEMICAL PREPARATIONS FOR MELTING SNOW AND ICE; CHEMICALS FOR TREATING HAZARDOUS WASTE; CATALYSTS FOR USE IN THE MANUFACTURE OF INDUSTRIAL CHEMICALS; CHEMICAL ADDITIVES FOR FUEL TREATMENT; CHEMICAL ADDITIVES FOR OIL WELL DRILLING FLUID; CHEMICALS USED IN ...