Description

9-Methyloctadecanoic Acid Ethyl Ester is a high-purity branched-chain fatty acid ester, a key intermediate in the synthesis of specialized lipids and fine chemicals. Its unique structure provides valuable properties for modifying surface activity, viscosity, and biocompatibility in advanced formulations. This compound is essential for R&D and production in the pharmaceutical, cosmetic, and specialty lubricant industries seeking to innovate with tailored molecular architectures.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and prodrugs requiring specific lipid solubility profiles.
• Cosmetic & Personal Care Ingredient: Serves as an emollient and skin-conditioning agent in high-end creams, lotions, and serums.
• Specialty Lubricant & Functional Fluid Additive: Imparts desirable low-temperature fluidity and oxidative stability to synthetic lubricants and hydraulic fluids.
• Chemical Synthesis Building Block: A versatile intermediate for organic synthesis, particularly in creating complex, branched-chain molecules for research.
• Polymer Plasticizer & Modifier: Enhances the flexibility and processing characteristics of specialized polymers and resins.
• Analytical Reference Standard: Employed as a certified reference material (CRM) in chromatography for quality control and method development.

Basic Information

Product Name	9-Methyloctadecanoic Acid Ethyl Ester
CAS No.	55334-34-4
Molecular Formula	C₂₁H₄₂O₂
Molecular Weight	326.56 g/mol
Synonyms	Ethyl 9-Methyloctadecanoate; 9-Methylstearic Acid Ethyl Ester; Ethyl 9-Methylstearate; Octadecanoic acid, 9-methyl-, ethyl ester; Iso-C19 Acid Ethyl Ester
EINECS	Contact for details

Quality Control

Our 9-Methyloctadecanoic Acid Ethyl Ester is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including chromatography (GC/HPLC) and spectroscopy, to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at controlled room temperature (15-25°C). This material is easily oxidized; for long-term storage, consider maintaining under an inert atmosphere (e.g., nitrogen or argon). Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20/D)	1.445 - 1.455
Specific Gravity (20°C)	0.860 - 0.880

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