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Abstract
Chemicals are used extensively in millions of different commercial products. These chemicals include extremely toxic substances which can cause allergies, damage vital organs of the human body like the eye, brain, liver, kidney and reproductive organs, produces deformities in babies during pregnancies of mothers and promote cancer. In case of accidental release into the environment in large quantities, as in case of Bhopal, they can lead to mass murder. What is amazing is that we know nothing about the toxic effect of 80 percent of the chemicals used. Industries which produce potentially toxic and hazardous wastes are pesticides, dyes and pigments, organic chemicals, fertilizer, non-ferrous metals, steel and chlor-alkali manufacturing plants. Some chemicals are essential at low levels but are toxic at function. The biochemical effect of some typical toxic chemical are widespread. When excessive amount of these chemicals are ingested, they replaces elements at key enzymatic sites, and causing metabolic disorders. A small fraction is bound most effectively by the body proteins while the rest is stored in the body and gradually accumulates with age.