[ CHEMICALS USED IN INDUSTRIES, NAMELY, ALKALIES, BIOCHEMICAL CATALYSTS; AND CATALYSTS, ] INDUSTRIAL CHEMICALS, CLARIFICATION PREPARATIONS, [ AND FLOCCULANTS, ] ALL FOR PURIFYING GAS, WATER AND SOIL, OR FOR NEUTRALIZING TOXIC MATERIALS; [ GAS PURIFYING PREPARATIONS FOR INDUSTRIAL USE; CARBONIC HYDRATES; IRON SALTS FOR INDUSTRIAL USE; TOXIC GAS NEUTRALIZERS, PREPARATIONS FOR THE PURIFICATION OF GAS FOR INDUSTRIAL USE; ] PURIFICATION PREPARATIONS FOR INDUSTRIAL USE; WATER PURIFYING CHEMICALS, S...