1 CHEMICAL PRODUCTS FOR INDUSTRIAL PURPOSES, NAMELY PHOSPHATES AND PHOSPHATE COMPOUNDS FOR WATER TREATMENT AND WATER PROCESSING; PHOSPHATES USED TO PREVENT DAMAGE CAUSED BY HARD WATERS AND BY INCRUSTATIONS IN WATER CARRYING SYSTEMS; CHEMICAL WATER SOFTENING AGENTS; CHEMICAL AGENTS FOR CLARIFYING AND PURIFYING DRINKING WATER, UTILITY WATER AND WASTE WATER