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Green Chemistry

Green chemistry in an emerging field of science that develops chemicals to be benign. Rather than presuming to keep human and ecological exposures to chemicals within levels of toxicity deemed “acceptable,”,  sustainable chemistry aim to make chemicals that are inherently safe.

Green chemistry  designs after a set of principles that include: Design chemical products that have little or no toxicity, and that break down to innocuous substances after use so that they do not accumulate in the environment; use renewable feedstock’s, such as corn and soybeans; design syntheses so that the final product contains the maximum proportion of the starting materials, with few atoms wasted; minimize the use of solvents, separation agents, or other auxiliary chemicals—when these chemicals are necessary, use innocuous chemicals such as water; and increase energy efficiency by manufacturing at ambient temperature and pressure.  As a result of green chemistry, in Dry Cleaning “Perc”( trichloroethylene)  is replaced and no longer needed, paint is made without petroleum and manufacturers of drugs such as ibuprofen does not produce hazardous wastes such as cyanide and formaldehyde.

The twelve principles of green chemistry

  • Prevent waste
  • Maximize atom economy
  • Safer chemicals & products
  • Safer solvents & reaction  conditions
  • Increase  energy efficiency
  • Use renewable feedstock’s
  • Avoid chemical derivatives (protein groups)
  • Use catalysts
  • Design chemicals & products to degrade after use
  • Analyse in real time to prevent pollution
  • Minimize potential for accidents


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