Dimer Acid

CAS NO. 61788-89-4

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Product Description

Product Name	Dimer Acid (C36 Dimerized Fatty Acid) Also known as: Dilinoleic Acid, Dimer Fatty Acid, Dimerized Vegetable Fatty Acid
CAS NO.	61788-89-4
EINECS Number	263-107-3
Molecular Formula	C₃₆H₆₄O₄ (Dicarboxylic Acid)
Chemical Structure
Technical Specifications	Dimer Content: ≥ 80.0% Trimer Content: ≤ 20.0% Monomer Content: ≤ 5.0% (Critical for resin quality) Acid Value: 190 - 198 mgKOH/g Saponification Value: 195 - 204 mgKOH/g Viscosity (25℃): 5,500 - 7,500 mPa·s Color (Gardner): ≤ 8 (Clear Amber Liquid) Iodine Value: 70 - 95 g I₂/100g
Physical Properties	Appearance: Clear amber to light brown viscous liquid Solubility: Soluble in most organic solvents; insoluble in water Flash Point: > 280°C Density (25°C): 0.95 - 0.97 g/cm³
Key Applications	A versatile bio-based building block for polymer synthesis: Polyamide Resins (Non-reactive): Reacts with diamines to produce resins for Flexographic Inks and Gravure Inks. Provides excellent adhesion, flexibility, and water resistance. Hot Melt Adhesives (PA HMA): Essential raw material for polyamide hot melt adhesives used in footwear, textiles, electronics encapsulation, and automotive interiors. Reactive Polyamides (Epoxy Curing Agents): Hardener for epoxy resins in heavy-duty protective coatings, marine coatings, and structural adhesives. Offers superior toughness and chemical resistance. Corrosion Inhibitors: Used in oilfield chemicals and metalworking fluids to form protective films on metal surfaces. Lubricants & Fuel Additives: Improves lubricity and acts as friction modifier in synthetic lubricants and cutting oils.
Packaging & Storage	Standard Pack: 200kg Plastic Drum Bulk Options: 20MT Flexibag / ISO Tank Container Storage: Store in a cool, dry, well-ventilated area. Keep away from oxidizing agents. Shelf life: 24 months in original sealed packaging.

⚖️ Equivalent to Leading Brands

Our Dimer Acid is a cost-effective alternative to international brands with comparable specifications:

Parameter	Royalchem	Pripol 1017	Radiacid 0951
Dimer Content	≥80%	≥80%	≥80%
Monomer Content	≤5%	≤5%	≤5%
Acid Value (mgKOH/g)	190-198	193-198	190-198
Color (Gardner)	≤8	≤6	≤8
Viscosity @25°C (mPa·s)	5500-7500	5500-8500	6000-8000
Bio-based	✓ Yes	✓ Yes	✓ Yes

* Contact us for detailed comparison and batch-specific COA.

❓ Frequently Asked Questions

Can your Dimer Acid replace Croda Pripol or Oleon Radiacid?

Yes. Our C36 Dimer Acid is formulated to match the key specifications of Pripol 1017 and Radiacid 0951. Many customers have successfully qualified our product as a drop-in replacement. We provide comparison tables and free samples for evaluation.

What documentation do you provide for export?

We provide: TDS, SDS/MSDS, COA, REACH registration status for EU export, and ISO 9001 certification. All documents are available in English.

Why does monomer content matter for polyamide resin quality?

Lower monomer content is crucial because: (1) It improves resin clarity and color; (2) It reduces odor in finished products; (3) It ensures consistent molecular weight and viscosity; (4) It enhances thermal stability. For high-quality ink applications, monomer ≤5% (ideally ≤1%) is recommended.

Is your Dimer Acid bio-based and sustainable?

Yes. Our Dimer Acid is derived from renewable vegetable oil sources (primarily tall oil fatty acids). It is biodegradable and aligns with sustainability initiatives in the coatings and adhesives industries.