Chemical preparations for testing swimming pool water; Chemicals for the treatment of hot water systems; Chemicals for the treatment of water and wastewater; Chemicals for use in decontamination of polluted sites; Chemicals for use in purification of water; Chemicals for use in water treatment; Chemicals in the nature of sorbents; Chlorine for swimming pools; Plant nutrition preparations; Unexposed photographic films; Unprocessed plastic in the form of powder or granules; Water purifying chem...