Description

2-(Trimethylsilyloxy)Stearic Acid Methyl Ester is a specialized organosilicon derivative of stearic acid, designed for applications requiring precise surface modification and chemical synthesis. This compound matters for its unique ability to act as a reactive intermediate or a functional additive, imparting hydrophobic and release properties to various materials. It is primarily needed by manufacturers in the silicone polymer, personal care, and specialty coatings industries, where its silyl-protected hydroxyl group offers versatile reactivity.

Application

• As a key intermediate in the synthesis of functionalized silicone oils and polymers.
• As a hydrophobizing agent and internal release agent in silicone rubber and resin formulations.
• As a surface modifier for inorganic fillers (e.g., silica, calcium carbonate) to improve dispersion in organic matrices.
• In personal care products as an emollient and conditioning agent with unique sensory properties.
• As a protective group for the hydroxyl function in complex organic synthesis.
• In the development of specialty coatings and inks to enhance water repellency and flow properties.
• As a lubricant additive to modify surface characteristics and reduce friction.

Basic Information

Product Name	2-(Trimethylsilyloxy)Stearic Acid Methyl Ester
CAS No.	56196-58-8
Molecular Formula	C22H46O3Si
Molecular Weight	386.69 g/mol
Synonyms	Methyl 2-(trimethylsilyloxy)octadecanoate; Methyl 2-(trimethylsiloxy)stearate; Stearic acid, 2-(trimethylsilyloxy)-, methyl ester; 2-Hydroxystearic acid methyl ester trimethylsilyl ether; 2-TMS-stearic acid methyl ester; Octadecanoic acid, 2-(trimethylsilyloxy)-, methyl ester
EINECS	Contact for details

Quality Control

Our 2-(Trimethylsilyloxy)Stearic Acid Methyl Ester is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including GC, HPLC, and NMR, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are available upon request to support your quality assurance and regulatory needs.

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); containers must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 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.