Description

Trimethoxypropylsilane is a versatile organosilicon compound, also known as 3-(Trimethoxysilyl)propane, that serves as a critical coupling agent and surface modifier. Its primary value lies in its ability to form strong, durable bonds between inorganic materials and organic polymers, enhancing composite performance. This chemical is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producers of advanced composites and silica-based materials.

Application

• As a silane coupling agent to improve the adhesion of polymers (e.g., epoxies, polyurethanes) to glass, metals, and mineral surfaces.
• As a surface treatment agent for silica, glass fibers, and other fillers to enhance dispersion and mechanical properties in composite materials.
• In the formulation of moisture-curable sealants and adhesives, where it acts as a crosslinker and adhesion promoter.
• As a key intermediate in the synthesis of more complex specialty silicone resins and polymers.
• For the hydrophobic treatment of construction materials like concrete and stone to provide water repellency.
• In the production of release coatings and mold-making applications.
• As a modifying agent in nanomaterial synthesis to functionalize nanoparticle surfaces.

Basic Information

Product Name	Trimethoxypropylsilane
CAS No.	1067-25-0
Molecular Formula	C6H16O3Si
Molecular Weight	164.28 g/mol
Synonyms	3-(Trimethoxysilyl)propane; 3-Trimethoxysilylpropane; Propyltrimethoxysilane; Trimethoxy(propyl)silane; (3-Trimethoxysilyl)propane; γ-Trimethoxypropylsilane; Silane, trimethoxypropyl-; NSC 93766; Dow Corning® Z-6075 (Trade Name)
EINECS	213-926-0

Quality Control

Our Trimethoxypropylsilane is manufactured under a stringent quality management system. Every batch undergoes rigorous analytical testing, including Gas Chromatography (GC) for purity and identity confirmation, to ensure it meets precise specifications for industrial and specialty applications. Certificates of Analysis (COA) documenting purity, assay, and key physical properties 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 area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) and highly volatile nature, containers must be kept tightly sealed and under an inert atmosphere (e.g., nitrogen) after opening to prevent moisture absorption and degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.390 - 1.400
Density (g/mL, 25°C)	0.940 - 0.960
Water Content (KF)	≤ 0.5%

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