Cashew nut Shell Liquid (CNSL) is a reddish brown viscous liquid, having the honey comb structure of the shell of cashew nut obtained from cashew tree. The demand for the product is quite enormous in Nigeria. CASHEW NUT SHELL LIQUID or CNSL or Cashew Nut Oil or Cashew Shell Oil or CNSL Oil is a versatile by product of the Cashew industry. The nut has a shell of about 1/8 inch thickness inside which is a soft honey comb structure containing a dark reddish brown viscous liquid. It is called CASHEW NUT SHELL LIQUID or CNSL. Which is the pericap fluid of the Cashew Nut. It is often considered as the better and cheaper material for unsaturated phenols. About 30-35% CNSL is present in the shell, which amounts to approximately 67% of the nut. CNSL has innumerable applications, such as friction linings, paints, laminating resins, rubber compounding resins, cashew cements, polyurethane based polymers, surfactants, epoxy resins, foundry chemicals, and intermediates for chemical industry. It offers much scope and varied opportunities for the development of other tailor-made polymers