For the disposal of hospital refuse, the bag made with cadmium is not used because incineration of the bag causes poisonous toxic fumes evolution. The colour of the bag is -
Waste collection bags for waste type needing incineration shall not be made of chlorinated plastics. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 21ST EDITION. PAGE NO - 735
Black
Red
Blue
Yellow
Hospital waste and disaster management, Occupational health