corporation formed from merger of four existing companies; Brunner, Mond & Co. , Limited, Nobel Industries Ltd., Nobel Industries & British Dyestuffs Corporation Ltd. The business has various subiduaries (see individual companies for details) that reflect earlier companies and those formed as technolgy changed. Corporation demerged from pharmaceuticals and agrochemicals businesses in 1993 to form Zeneca PLC (now - 2007 AstraZeneca PLC). Known as Imperial Chemical Industries PLC (since 1980)