Green Chemistry is about: 1. Waste minimization of source 2. Use of catalysts in place of reagents 3. Using non-toxic reagents 4. Use of renewable resources 5. Improved atom efficiency

1. Green synthesis
• Definition :
green chemistry is the utilization of a set of principles that
reduces or eliminates the use or generation of hazardous substances in
the design , manufacture and application of chemical products.
Green synthesis:
green synthesis describes the techniques to eliminate
them.
Green Chemistry is about:
• Waste minimization of source
• use of catalysts in place of reagents
• Using non-toxic reagents
• Use of renewable resources
• Improved atom efficienciency

2. Why do we need Green chemistry
 Chemistry is undeniably a very prominent part
of our daily lives.
 Chemical developments also bring new
environmental problems and harmful
unexpected side effects, which result in the need
for ‘greener’ chemical products.
 A famous example is the pesticide DDT.

3. The Principles of Green Chemistry
1. Prevention:-It is better to prevent waste than to treat or clean up
waste after it has been created.
2. Atom Economy :- Synthetic methods should be designed to
maximize the incorporation of all materials used in process into
final product.
3. Less Hazardous Chemical Cyntheses:-Whenever practicable,
synthetic methods should be designed to use and generate
substances that possess little or no toxicity to human health and
the environment.
4. Designing Safer Chemicals:-Chemical products should be
designed to affect their desired function while minimizing their
toxicity.
5. Design For Energy Efficiency:- Energy requirements of chemical
processed should be recognized for their environmental and
economic impacts and should be minimized.

4. Principles of Green Chemistry
• 6 Use of Renewable Feedstocks:-
–A raw material or feedstock should be renewable
rather than depleting whenever technically and
economically practicable.
• 7 Inherently Safer Chemistry for Accident
Prevention:-
–Substances and the form of a substance used in a
chemical process should be chosen to minimise
the potential for chemical accidents, including
releases, explosions, and fires.

5. The major uses of GREEN CHEMISTRY
 Energy
 Global Change
 Resource Depletion
 Food Supply
 Toxics in the Environment

6. Conclusion
• Green chemistry Not a solution to all
environmental problems But the most
fundamental approach to preventing
pollution.

7. Thank you!