Description

3-(Methoxy)Propyltrimethoxysilane is a versatile organosilicon coupling agent and monomer. This compound is essential for modifying material interfaces, enhancing adhesion, and improving compatibility between organic polymers and inorganic substrates. It is a critical raw material for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producers of specialty composites and surface treatments.

Application

• As a coupling agent in mineral-filled composites (e.g., glass fiber, silica) to improve mechanical strength and moisture resistance.
• Surface modification of inorganic pigments and fillers for better dispersion in polymer matrices.
• Primer or additive in adhesives and sealants to enhance bonding to glass, metals, and masonry.
• Key intermediate in the synthesis of specialty silicone resins and modified siloxanes.
• Hydrophobic coating agent for construction materials, textiles, and electronic components.
• Crosslinking agent in moisture-curable polymer systems, such as silicone sealants.
• Improving the water repellency and durability of architectural and industrial coatings.

Basic Information

Product Name	3-(Methoxy)Propyltrimethoxysilane
CAS No.	33580-59-5
Molecular Formula	C7H18O4Si
Molecular Weight	194.30 g/mol
Synonyms	Methoxypropyltrimethoxysilane; (3-Methoxypropyl)trimethoxysilane; Trimethoxy(3-methoxypropyl)silane; Silane, trimethoxy[3-(methoxy)propyl]-; MEMO; Dynasylan® MEMO; 3-MPTMS; γ-Methoxypropyltrimethoxysilane
EINECS	251-571-4

Quality Control

Our 3-(Methoxy)Propyltrimethoxysilane is produced under a strict quality management system. Every batch undergoes rigorous analytical testing, including gas chromatography (GC) for purity and identity confirmation, to ensure it meets precise specifications. Certificates of Analysis (COA) with detailed batch data 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). Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed when not in use to prevent moisture absorption and evaporation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to standard
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.410 - 1.415
Density (20°C)	1.00 - 1.05 g/cm³

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