Cashew Nuts Shell Liquid

Cashew Nuts Shell Liquid or Cashew Nut Oil or Cashew Shell Oil is a versatile 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 Nuts Shell Liquid or CNSL, Which is the periapt fluid of the Cashew Nut. It is often considered as the better and cheaper material for unsaturated phenols.

We had established CNSL (Cashew nut Shell Liquid) manufacturing unit in 2005.

The residue after extraction of CNSL is Shell Cake, which are a very useful fuel and a substitute for firewood.

CNSL undergoes all the conventional reactions of phenols, CNSL aldehyde condensation products and CNSL based phenolic Resins are used in applications such as surface coatings, adhesives. Various polyamines synthesised from CNSL are used s curing agents for epoxy resins.

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.

Numbers of products based on CNSL are used as antioxidants, stabilizers and demulsifies for petroleum products. Soluble metal derivatives of C.N.S.L are used to improve the resistance to oxidation and sludge formation of Lubricating oils. Oxidized CNSL and its derivatives are also used as demulsifying agents for water in oil type petroleum emulsions.

CNSL and its derivatives have been used as antioxidants, plasticizers and processing aids for rubber compounds, modifiers for plastic materials and used to provide oxidative resistance sulphur-cured natural rubber products. It is also added to rubber gum stock or nitrile rubber to improve the process ability, mechanical properties and resistance to crack and cut properties of the vulcanisates.

  • Addition polymerization the side chain double bonds.
  • Condensation polymerization at the ortho and para positions of the ring with phenolic various chemicals.
  • Polymerization after chemical modification.
  • Oxidative polymerization.
  • Polymerization by physical means: heat, pressure, radiation, and electrical discharge.
  • Various combinations of above methods


  • Specific Gravity 300 C : 0.950 - 0.970
  • Viscosity 300oC in centipoises: 200 max.
  • Moisture by weight : 1.0
  • Matter insoluble in toluene weight : 1.0
  • Loss in weight on heating : 2
  • Ash % by weight : 1.0
  • Iodine Value : (min.)
    • Wij’s Method : 250
    • catalytic method : 375
  • Polymerization
    • Time in Minutes : 4