Dimer Acid CAS 61788-89-4 Manufacturer | Hydrogenated & Distilled Grade
Name: Dimer Acid
Cas: 61788-89-4
Purity: 99%
MOQ: 1KG
Directory Guidance on Dimer Acid
Chemical Structure
Basic Info
Dimer Acid (CAS Registry Number: 61788-89-4), scientifically classified as a C36 dibasic fatty acid, is a high-molecular-weight dicarboxylic acid produced through the thermal catalytic polymerization of unsaturated C18 fatty acids (such as oleic and linoleic acids) derived from natural vegetable oils. Through subsequent high-vacuum molecular distillation and optional catalytic hydrogenation, manufacturers achieve varying commercial grades ranging from standard technical purity to water-clear, fully hydrogenated specifications.
Manufactured under precision thermal control by Shandong Zhishang Chem, our Dimer Acid exhibits exceptional thermal stability, low Gardner color indices, high dimer content (≥ 95.0%), and minimal monobasic or trimer fractions. It acts as an essential reactive building block for high-performance polyamide resins, reactive hot melt adhesives, surface coatings, and engineering polyurethane systems.
| Technical Parameter | Standard Specification (Distilled Grade) | Analytical Test Method |
|---|---|---|
| CAS Registry Number | 61788-89-4 | EINECS: 500-147-9 |
| Chemical Classification | C36 Dibasic Polycarboxylic Acid | Polymerized Fatty Acid Derivative |
| Appearance (25°C) | Clear, amber to light yellow viscous liquid | Visual Inspection |
| Dimer Content (%) | ≥ 95.0% | Gas Chromatography (GC) / SEC |
| Monomer Content (%) | ≤ 1.0% | GC Area Normalization |
| Trimer Content (%) | ≥ 4.0% – 8.0% (Grade Dependent) | Size Exclusion Chromatography |
| Acid Value (mg KOH/g) | 190 – 198 | ASTM D1980 / Potentiometric Titration |
| Saponification Value (mg KOH/g) | 195 – 202 | ASTM D1962 Titration |
| Color (Gardner Scale) | ≤ 3.0 / ≤ 1.0 (Hydrogenated) | ASTM D1544 |
Product Packaging
Dimer Acid’s unique aliphatic backbone, high functionality, and hydrophobic flexibility make it indispensable across multiple heavy industrial and polymer sectors:
Polyamide Resins for Printing Inks: Serves as the primary dicarboxylic acid building block reacting with ethylene diamine to produce co-polyamide resins used in flexographic and gravure packaging inks, providing excellent adhesion on plastic films.
Reactive Hot Melt Adhesives (HMA): Reacts with polyether or polyester polyols to formulate high-performance reactive hot melts utilized in automotive assembly, bookbinding, and woodworking.
Corrosion Inhibitors & Lubricant Additives: Functions as a hydrophobic surface-active intermediate and rust preventative in metalworking fluids, industrial greases, and fuel oil additives.
Polyurethane & Epoxy Modifiers: Imparts flexibility, impact resistance, and water repellency when integrated into epoxy curing agents and engineering polyurethane elastomers.
FAQ
A: Standard distilled dimer acid retains trace unsaturation which can cause color darkening upon prolonged thermal exposure. Hydrogenated dimer acid undergoes catalytic saturation of remaining double bonds, resulting in superior thermal stability, water-clear Gardner color (≤ 1.0), and enhanced oxidation resistance.
A: Store in tightly sealed carbon steel or stainless steel containers in a cool, dry, well-ventilated warehouse away from strong oxidizing agents and direct heat sources. Under proper storage, shelf life is 24 months.
A: We supply Dimer Acid in 190 kg new steel drums, 950 kg IBC totes, or bulk ISO tanks. Every shipment includes a batch-specific Certificate of Analysis (COA) and a GHS-compliant Safety Data Sheet (SDS).
Related References
Pubchem-Dimer Acid
Chemicalbook-Dimer Acid
Quality Management & International Certifications
To align with global chemical compliance and supply chain standards, Shandong Zhishang Chemical operates under rigorous industrial quality systems:
ISO 9001:2015 Quality Management: Standardized oversight spanning raw fatty acid feedstock selection, high-pressure polymerization, vacuum fractional distillation, and drum filling.
REACH Registration Compliance: Comprehensive technical dossier support provided for European Union importers and industrial polymer formulators.
RoHS & Heavy Metal Regulation Alignment: Manufactured free of restricted toxic metals and hazardous plasticizer residues, ensuring compatibility with electrical and automotive manufacturing specs.
Safe Transport & Logistics Protocols: Non-hazardous chemical classification with robust packaging integrity ensuring safe intercontinental ocean and land freight delivery.
To ensure consistent molecular weight distribution and prevent gelation or viscosity drift in downstream resin synthesis, every production batch of Dimer Acid undergoes rigorous in-house laboratory testing prior to Certificate of Analysis (COA) issuance:
- Size Exclusion Chromatography (SEC) / GC Analysis: Quantifies exact monomer, dimer, and trimer ratios to verify structural purity and molecular weight distribution.
- Acid Value & Saponification Titration: Measures reactive carboxyl functionality to ensure consistent stoichiometry during polycondensation reactions with diamines.
- Gardner Color & Clarity Evaluation: Spectrophotometric and visual screening ensuring low color index for clear adhesive and coating formulations.
- Viscosity & Moisture Profiling: Brookfield rotational viscometry and Karl Fischer moisture titration (≤ 0.1%) confirming low water content for moisture-sensitive polyurethane systems.
Manufacturer of Dimer Acid
1. For products ≤50kg, we recommend using express delivery, which is usually called DDU service (discounted, convenient).
2. For products ≤500kg, we generally recommend air freight, which is usually called FOB, CFR or CIF service (fast and efficient).
3. For products >500kg, we generally recommend shipping by sea, which is usually called FOB, CFR or CIF service (economical, safe).
4. For high-value products, please choose air or express to ensure the safety of product transportation.
