Description

n-Methylaminopropyltrimethoxysilane is a bifunctional organosilane coupling agent featuring both a reactive methoxysilane group and a secondary amino group. This unique structure makes it a critical component for enhancing adhesion and compatibility between inorganic materials and organic polymers. It is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as in advanced composite and mineral-filled plastic applications, seeking to improve mechanical properties and long-term durability.

Application

• As a coupling agent and adhesion promoter in epoxy, polyurethane, and acrylic-based coatings and adhesives.
• Surface treatment for glass fibers, minerals (e.g., silica, clay), and metals to improve bonding with polymer matrices in composites.
• Crosslinking agent or modifier in silicone resins and sealants to enhance performance characteristics.
• Primer for improving paint adhesion on difficult substrates like aluminum and galvanized steel.
• Intermediate in the synthesis of more complex silane derivatives for specialized applications.
• Used in tire manufacturing and rubber compounding to improve filler-rubber interaction.

Basic Information

Product Name	n-Methylaminopropyltrimethoxysilane
CAS No.	3069-25-8
Molecular Formula	C7H19NO3Si
Molecular Weight	193.32 g/mol
Synonyms	N-Methyl-3-aminopropyltrimethoxysilane; 3-(Methylamino)propyltrimethoxysilane; Methylaminopropyltrimethoxysilane; MAPTMS; N-Methylaminopropyltrimethoxysilane; (3-(Methylamino)propyl)trimethoxysilane; Silane A-1120 (common trade name); γ-(Methylamino)propyltrimethoxysilane
EINECS	221-320-2

Quality Control

Our n-Methylaminopropyltrimethoxysilane is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, FTIR, and titration methods, to ensure consistent purity and performance. A comprehensive Certificate of Analysis (COA) detailing assay, identity, and impurity profiles is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C/59-77°F). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed and under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.420 - 1.425
Density (20°C)	0.980 - 1.010 g/mL

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