Description

1,18-Octadecanediol is a long-chain aliphatic diol with the CAS number 3155-43-9, serving as a versatile building block in polymer and specialty chemical synthesis. Its bifunctional nature, featuring two terminal hydroxyl groups, makes it a valuable monomer for creating polyesters, polyurethanes, and other polymers with specific chain lengths and properties. This compound is particularly relevant for manufacturers in the polymer, lubricant, cosmetic, and pharmaceutical intermediate industries seeking to tailor material characteristics such as flexibility, hydrophobicity, and melting point.

Application

• Polymer Synthesis: A key monomer for producing long-chain polyesters and polyurethanes, imparting flexibility and specific thermal properties to the final materials.
• Lubricant & Grease Formulation: Used in the synthesis of ester-based synthetic lubricants and thickeners, offering good stability and low-temperature performance.
• Cosmetic & Personal Care: Acts as an emollient and viscosity modifier in creams, lotions, and other formulations.
• Pharmaceutical Intermediates: Serves as a starting material or spacer in the synthesis of more complex drug molecules and prodrugs.
• Surface Coatings & Resins: Incorporated into alkyd resins and other coating systems to modify film properties and durability.
• Plasticizer Production: Used to create polymeric plasticizers for PVC and other plastics, enhancing flexibility without significant migration.
• Research & Development: A valuable standard and reagent in chemical research for studying polymer kinetics and material science.

Basic Information

Product Name	1,18-Octadecanediol
CAS No.	3155-43-9
Molecular Formula	C₁₈H₃₈O₂
Molecular Weight	286.50 g/mol
Synonyms	Octadecane-1,18-diol; 1,18-Dihydroxyoctadecane; Octamethylene Glycol (common name for C8 diols, sometimes used); α,ω-Octadecanediol; Long-chain diol C18; Stearyl Alcohol Dimer (informal); 18-Hydroxyoctadecan-1-ol; Octadecanedioic Acid Dihydro Derivative
EINECS	221-605-5

Quality Control

Our 1,18-Octadecanediol is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and physical properties. A comprehensive Certificate of Analysis (COA) detailing results for assay, melting point, and impurity profiles is available for every shipment, providing full traceability and compliance assurance for your quality protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or flakes
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	95 - 100 °C
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.