Description

9,10,12,13,18-Pentakis(Trimethylsiloxy)Octadecanoic Acid Methyl Ester is a high-value organosilicon derivative of a fatty acid methyl ester, characterized by its multiple trimethylsiloxy functional groups. This unique structure imparts significant hydrophobicity, thermal stability, and surface-modifying properties, making it a critical intermediate for advanced material synthesis. It is primarily sought after by R&D and production teams in the specialty chemical, personal care, and performance materials sectors for developing novel silicone-based compounds.

Application

• Silicone Resin & Polymer Modifier: Acts as a reactive intermediate or cross-linking agent to enhance the hydrophobicity, flexibility, and thermal stability of silicone polymers.
• Surface Treatment Agent: Used to impart water-repellent (hydrophobic) and release properties to textiles, paper, and various substrates.
• Personal Care Ingredient: Serves as a key raw material for synthesizing novel silicone-based emollients, conditioning agents, and film-formers in cosmetics and haircare.
• Lubricant & Grease Additive: Employed as a high-performance additive to improve the lubricity, oxidation resistance, and wide-temperature performance of specialty lubricants.
• Adhesive & Sealant Formulation: Functions as a compatibilizer and property enhancer in high-performance silicone and hybrid adhesive systems.
• Research & Development: A valuable building block in organic and organometallic chemistry for creating novel functionalized molecules and materials.

Basic Information

Product Name	9,10,12,13,18-Pentakis(Trimethylsiloxy)Octadecanoic Acid Methyl Ester
CAS No.	21987-18-8
Molecular Formula	C₃₃H₇₈O₈Si₅
Molecular Weight	723.4 g/mol
Synonyms	Methyl 9,10,12,13,18-pentakis(trimethylsiloxy)octadecanoate; Methyl 9,10,12,13,18-pentakis(trimethylsilyloxy)octadecanoate; Octadecanoic acid, 9,10,12,13,18-pentakis(trimethylsiloxy)-, methyl ester; Methyl pentakis(trimethylsiloxy)stearate; Silated fatty acid methyl ester; TMS-derivatized stearic acid methyl ester
EINECS	Contact for details

Quality Control

Our production of 9,10,12,13,18-Pentakis(Trimethylsiloxy)Octadecanoic Acid Methyl Ester adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including GC/HPLC for purity and identity confirmation (IR, NMR), to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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 hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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