Our Flagship Product

What Is CNSL?

Cashew Nut Shell Liquid (CNSL) is a naturally occurring phenolic oil found in the honeycomb structure of the cashew nut shell — a by-product of cashew nut processing. It is one of the few naturally occurring phenols available in commercial quantities and is considered a premier bio-based chemical feedstock.

CNSL is not a single compound. It is a complex mixture of four main phenolic components — each with a C15 unsaturated side chain that gives CNSL its unique reactivity and versatility, making it highly valuable for chemical synthesis and polymer production.

Elrisa Chemicals extracts CNSL directly from cashew shells sourced in Ghana's Bono region — one of West Africa's largest cashew-producing zones — ensuring a reliable, traceable, and sustainably harvested supply.

Chemical Composition

What CNSL Is Made Of

CNSL is a complex phenolic mixture. Its four key components each have distinct chemistry and industrial utility.

~60–65%

Anacardic Acid

The dominant component in raw/technical CNSL. A 2-hydroxy benzoic acid derivative with a C15 alkenyl side chain. Excellent antimicrobial and anti-corrosive properties. Decarboxylates to cardanol on heating.

~15–20%

Cardanol

The primary component of technical-grade CNSL after processing. A monohydric phenol with high chemical reactivity. Widely used in resins, coatings, surfactants, friction dust, and as a plasticizer. Elrisa's key refined derivative.

~10–15%

Cardol

A dihydric phenol (meta-resorcinol derivative). Has strong biological activity and is being explored for pharmaceutical, anti-termite, and specialty resin applications.

~2–5%

2-Methylcardol

A minor but reactive component structurally related to cardol. Contributes to the overall reactivity profile of CNSL in polymer and resin systems.

Technical Properties

Why CNSL Stands Apart

Property	Detail	Industrial Significance
High Thermal Stability	Withstands temperatures above 250°C without significant degradation	Critical for friction materials, brake pads, and high-temperature coatings
Chemical Resistance	Resistant to acids, alkalis, and many solvents due to phenolic structure	Protective coatings, waterproofing, chemical lining applications
Natural Polymerization	Reactive unsaturated C15 side chain enables self-polymerization	Can form durable polymers without petrochemical co-reactants
Bio-Renewable	100% derived from agricultural residue (cashew shells)	Reduces fossil feedstock dependency; qualifies for bio-based product certifications
Versatile Reactivity	Reacts with formaldehyde, epoxies, isocyanates, and amines	Base for a wide range of polymer, resin, and coating chemistries
Low Cost of Feedstock	Extracted from cashew shells — an abundant agro-waste in West Africa	Competitive pricing versus petroleum-derived phenols

Applications

Where CNSL Is Used

CNSL and its derivatives (cardanol, cardol) are used across a remarkably broad range of industrial sectors — from automotive to construction to consumer goods.

Friction Materials

CNSL-based resins are the standard binder in automotive brake pads, brake linings, and clutch facings — providing high heat resistance and consistent friction performance.

Surface Coatings

Cardanol-based coatings offer excellent adhesion, water resistance, and corrosion protection. Used in industrial protective coatings, marine coatings, floor coatings, and anti-corrosive paints.

Phenolic & Epoxy Resins

CNSL reacts with formaldehyde to produce novolac and resol phenolic resins. Cardanol-modified epoxy resins offer improved flexibility and bio-based content — used in laminates, composites, and adhesives.

Applying protective coating to wood surface

Waterproofing

CNSL-based waterproofing compounds are applied to wood, concrete, and masonry surfaces. Traditionally used in cashew nut shell oil (CNSO) wood preservatives and building waterproof treatments.

Laminates & Composites

CNSL resins are used as binders in decorative laminates, electrical laminates, and fibre-reinforced composites. Offering good dielectric properties and thermal resistance.

Surfactants & Additives

Cardanol is sulfonated, ethoxylated, or phosphorylated to produce bio-based surfactants, wetting agents, and emulsifiers for industrial cleaning, textile, and agricultural applications.

Source Advantage

Why CNSL from Ghana?

Ghana — and the wider West Africa region — is one of the world's leading cashew-producing areas. The Bono region, where Elrisa operates, sits at the heart of Ghana's cashew belt, giving us direct, cost-efficient access to large volumes of cashew shells.

Abundant, locally sourced cashew shell feedstock
Sustainable — uses agro-industrial waste, not virgin resources
Traceable supply chain from shell to finished product
Competitive pricing versus imported synthetic phenols
Supporting local farmers and Ghana's green economy

Cashew Nut Shell Liquid (CNSL)