CNSL (Cashew Nut Shell Liquid)

SKU: CCI001.

CNSL (heated), the heating process of the Raw CNSL leads to decarboxylation of the anacardic acid to Cardanol and the typicall composition of technical CNSL is approximately 52% cardanol,10% cardol, 30% polymeric material, with the remainder being made up of other substances.

Chemical Composition of CNSL


Product Description

Futher processing of technical CNSL in the distilation process at reduced pressure leads to removal of the polymeric material called Residol. The composition of the distilled CNSL contains approximately 78% of cardanol, 8% cardol, 2% polymeric material, less than < 1% 2-methyl cardanol, 2.3% heptadecyl homologue triene, 3.8% heptadecyl homologue diene and the remainder other homologous phenols.

Properties:  Technical CNSL undergoes all typical phenolic reactions. Its versatility in polymerization and chemicals modification and low cost find its application in the polymeric based industries . Technical CNSL properties have advantage over phenolic in certain applications such as impact resistance, flexibility, faster heat dissipation, anti corrosive, anti- microbial, insecticidal and resistant to alkali and acid solutions as well as mineral and fatty oils and various organic solvents.


A typical physical and chemical characteristics of Technical CNSL are as shown below:

Appearance Dark Brown Liquid
Specific Gravity @ 30°C 0.92 – 0.96
Viscosity @ 30°C 50 – 200 cps
Ash Content (%) 1% (Max.)
Moisture Content 2% (Max.)
Insolubles in Toluene (%) 1% (Max.)
Acid Value (mgmKOH/gm) < 20
Hydroxyl Value (mgmKOH/gm) 170-250
Iodine Value (WIJS) 220 – 270
Saponification Value 18 – 30



Viscosity @ 30degree Celsius (Brooke Fields Method) 130CPS max.
Ash Content at 800 degree Celsius 0.5% to 0.95%
Polymerization time 3 minutes max.
Moisture Content 0.3% max
Insoluble Matter in toluene 1% max.


Figure : Structures of Anacardic acid, Cardanol and Cardol




Cashew Nut Shell Liquid (CNSL) can be packed in any of the following :

  • MS drums – 200kgs net weight
  • IBC Tanks
  • Flexi tanks of (19KL/22KL/24KL)
  • Tanker trucks



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