Description

4-Octadecenoic Acid is a monounsaturated fatty acid of significant industrial interest. This compound serves as a valuable intermediate and functional additive in the synthesis of specialty chemicals and advanced materials. It is particularly relevant for manufacturers in the personal care, lubricant, and polymer industries seeking to modify product properties or develop novel formulations. The material is supplied with a CAS number of 21735-78-4.

Application

• Surfactant & Emulsifier Synthesis: A key intermediate for producing amphiphilic compounds used in detergents, cosmetics, and industrial cleaners.
• Lubricant & Grease Formulation: Acts as a friction modifier and additive to enhance the performance characteristics of synthetic and bio-based lubricants.
• Polymer & Resin Modification: Used in the production of alkyd resins, polyesters, and other polymers to impart flexibility, adhesion, or specific chemical resistance.
• Personal Care Ingredients: Employed in the manufacture of esters and derivatives for creams, lotions, and other cosmetic formulations.
• Chemical Intermediate: Serves as a building block in organic synthesis for pharmaceuticals, agrochemicals, and flavor/fragrance compounds.
• Corrosion Inhibitors: A component in formulations designed to protect metal surfaces in various industrial processes.

Basic Information

Product Name	4-Octadecenoic Acid
CAS No.	21735-78-4
Molecular Formula	C₁₈H₃₄O₂
Molecular Weight	282.46 g/mol
Synonyms	Oleic Acid (isomer); (E)-4-Octadecenoic Acid; (Z)-4-Octadecenoic Acid; 4-Octadecenoic acid, (E)-; 4-Octadecenoic acid, (Z)-; cis-4-Octadecenoic Acid; trans-4-Octadecenoic Acid; Petroselaidic Acid (isomer)
EINECS	244-561-1

Quality Control

Our 4-Octadecenoic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A detailed Certificate of Analysis (COA) documenting key parameters such as assay, acid value, and isomer content is provided with every shipment to guarantee it meets your specific application requirements.

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). Due to its property of being easily oxidized, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation and to minimize contact with air upon opening.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms
Assay (GC)	≥ 95.0%
Acid Value	195 - 205 mg KOH/g
Melting Point	50 - 55 °C
Heavy Metals (as Pb)	≤ 10 ppm

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