The Global Source for Sustainable Bio-Polymers & Green Energy Feedstocks

We are a premier manufacturer of high-purity Cardanol, Technical Grade CNSL, and Phenalkamine Epoxy Hardeners. From heavy-duty marine coatings to advanced biofuel feedstocks, we deliver 100% bio-based alternatives to petroleum phenols for the European and global markets.

Know Who We Are

About our company

The Gem of Bio-Polymers

Diamond Cashew Products Private Limited is a premier global manufacturer offering a wide range of Cashew Nut Shell Products of exceptional quality, expediently supplied to meet the precise requirements of our international clientele. We are dedicated to providing sustainable, bio-based alternatives to traditional petrochemicals, serving as a vital supply chain partner for the global coatings, automotive, and renewable energy sectors.

Led by our CEO, Dr. R. Thirumurugan, who brings over 25 years of vast experience in the manufacturing and marketing of CNSL, Cardanol, and related products, our company has mastered the nuances of advanced bio-polymer manufacturing. From the inception of the unit, his deep involvement has ensured the delivery of premium products and the rigorous systematization of our organization.

We don’t just extract chemicals; we extract value from agricultural waste, transforming it into the bulding block of modern industry.

Powering Europe’s Green Transition

Leading the European Shift to Sustainable Chemistry

As European environmental regulations tighten and the maritime industry races toward net-zero emissions, relying on volatile petrochemicals is no longer an option. Diamond Cashew Products bridges the gap between agricultural sustainability and heavy industrial performance.

Marine Biofuel Feedstock for Europe

We manufacture highly stabilized, Degummed CNSL specifically engineered for the European energy sector. By meticulously removing engine-corroding polymers and metallic ash, our refined biomass serves as an ideal, low-sulfur, high-calorific drop-in feedstock for marine biofuels, helping vessels easily comply with FuelEU Maritime and MARPOL Annex VI regulations.

Eco-Friendly Phenol Alternatives

For European resin and coating manufacturers, our high-purity Cardanol offers a REACH-compliant, sustainable alternative to toxic petroleum phenols without sacrificing flexibility or water resistance. Our products are ISCC Certified and we are ISO Certified manufacturer. We meet the strict mandates required to supply the European energy sector.

Our Core Industrial Products

Precision Engineering from Cashew Nut Shell Liquid

We offer a robust portfolio of robust products designed to meet multiple and broad requirements, helping customers in their product consolidation efforts.

Cardanol (Bio-Based Phenol)

Cardanol
(Bio-Based Phenol)

Extracted via continuous vacuum distillation, our Cardanol is a premium, naturally occurring phenolic compound. With an installed capacity of 3,000 MT per month, we supply global epoxy, surfactant, and adhesive manufacturers looking for superior flexibility and moisture resistance.
Refined & Degummed CNSL

CNSL
(Refined & Degummed)

We process 1,500 MT of Cashew Nut Shell Liquid monthly. Beyond standard technical grades for marine paints and varnishes, we specialize in low-viscosity Degummed CNSL, the premier renewable biomass feedstock for global biofuel blending.
Phenalkamines (Specialty Epoxy Hardeners)

Phenalkamines (Specialty Epoxy Hardeners)

Our facility produces 200 MT of advanced epoxy hardeners monthly. Derived from natural Cardanol, our Phenalkamines deliver extreme fast cures, low-temperature curing (below 0°C), and excellent salt-water resistance for heavy-duty maritime and civil coatings.
Cashew Friction Dust & Residol

Cashew Friction Dust & Residol

We utilize every fraction of our raw materials. Our Friction Dust (300 MT/month) stabilizes heat and reduces noise in automotive brake pads, while our Residol (900 MT/month) serves as a resilient binding agent for foundry core oils and heavy rubber compounding.

ISCC Certified Biofuel Feedstock

Certificate No. : EU-ISCC-Cert-MY231-20262292

Diamond Cashew Products is officially ISCC Certified. We meet the strict sustainability and traceability mandates required to supply the European energy sector. Our Degummed CNSL is a fully compliant, premium biomass feedstock ready for immediate marine biofuel blending in the EU.

ISO 9001:2015 Certified Manufacturing Excellence

Certificate No. : IN/23/4097

Diamond Cashew Products is proudly an ISO Certified manufacturer. This globally recognized accreditation guarantees that every metric ton of Cardanol, CNSL, and Phenalkamine we produce adheres to the strictest international standards for quality management, consistency, and operational excellence.

Secure Your Global Supply Chain Today

Whether you require a bulk ISO tank of Degummed CNSL for European biofuel blending or recurring shipments of Phenalkamine hardeners, Diamond Cashew Products is your reliable partner. Products supply is available worldwide.

Testimonials

Trusted by Industry Leaders Worldwide

From European marine biofuel blenders to global automotive manufacturers, see why top procurement managers rely on Diamond Cashew Products for unwavering quality, batch after batch.

Securing a reliable, ISCC-certified supplier for marine biofuel feedstocks was a major hurdle for us until we partnered with Diamond Cashew Products. Their Degummed CNSL is exceptionally stable, and their ability to consistently ship bulk ISO tanks to Europe has made our transition to net-zero shipping completely seamless.

Lars Knudsen

The batch-to-batch consistency of their Phenalkamine epoxy hardeners is simply unmatched. We require extreme low-temperature curing and high salt-water resistance for our heavy-duty marine paints, and Diamond Cashew delivers every single time. Their ISO-certified quality control gives our QA team complete peace of mind.

Sarah Jenkins

In the automotive brake pad industry, raw material stability is critical for safety. We use Diamond Cashew's Friction Dust across our entire line of commercial brake linings. Not only is the thermal resistance superior, but their massive 3,000+ MT monthly production capacity ensures our manufacturing plants never face supply chain bottlenecks.

Hiroshi Tanaka

As an international chemical distributor, we deal with dozens of manufacturers, but Dr. Thirumurugan's team at Diamond Cashew stands in a league of their own. Their continuous distillation technology yields an incredibly pure product, and their export team makes shipping from the Chennai port to our facilities completely frictionless. Highly recommended.

Rajesh Patel

Latest News

The Forefront of Green Chemistry

Explore the latest technical insights, industry trends, and innovations in bio-based polymers. Stay ahead of the curve on European biofuel mandates, epoxy applications, and sustainable manufacturing.

Navigating Net-Zero: Why Degummed CNSL is the Premier Marine Biofuel Feedstock for Europe

Navigating Net-Zero: Why Degummed CNSL is the Premier Marine Biofuel Feedstock for Europe

The European maritime industry is undergoing the most aggressive energy transition in its history. Driven by the IMO’s MARPOL Annex VI regulations, the FuelEU Maritime initiative, and the EU Emissions Trading System (ETS), shipping companies and fuel blenders are under massive pressure to decarbonize. The era of relying solely on heavy, high-sulfur bunker fuel is […]

The Future of Green Chemistry: Why Industry Leaders Are Replacing Petroleum Phenol with Cardanol

The Future of Green Chemistry: Why Industry Leaders Are Replacing Petroleum Phenol with Cardanol

If you are a chemical engineer or a procurement manager in today’s manufacturing landscape, you are likely feeling the squeeze. Between tightening global environmental regulations (like REACH in Europe), unpredictable crude oil prices, and the corporate push to meet aggressive ESG (Environmental, Social, and Governance) goals, relying on traditional petrochemicals is becoming a liability. For […]