Description

m-Aminophenyltrimethoxysilane CAS NO 70411-42-6 is a bifunctional organosilane coupling agent featuring both an aromatic amine group and hydrolyzable methoxysilane groups. This unique structure makes it a critical component for enhancing adhesion and compatibility between organic polymers and inorganic substrates. It is essential for manufacturers in the advanced composites, coatings, and electronics industries seeking to improve material performance and durability.

Application

• As a coupling agent and adhesion promoter in fiberglass-reinforced plastics (FRP) and advanced composite materials.
• Surface modification of silica, glass fibers, and other mineral fillers to improve dispersion and interfacial bonding in polymer matrices.
• Key intermediate in the synthesis of specialized silane-modified polymers and resins for high-performance coatings and sealants.
• Used in the formulation of primers and adhesion layers for paints and coatings on difficult-to-bond substrates like metals and glass.
• Potential applications in the electronics industry for the surface treatment of silica in semiconductor encapsulation materials.
• Modification of nanoparticles for use in specialized nanocomposites with enhanced mechanical properties.

Basic Information

Product Name	m-Aminophenyltrimethoxysilane
CAS No.	70411-42-6
Molecular Formula	C9H15NO3Si
Molecular Weight	213.31 g/mol
Synonyms	3-Aminophenyltrimethoxysilane; (3-Aminophenyl)trimethoxysilane; m-APTS; 3-(Trimethoxysilyl)aniline; Silane, (3-aminophenyl)trimethoxy-; 3-Aminophenyltrimethoxy silane; Amino Phenyl Trimethoxy Silane; γ-Anilinopropyltrimethoxysilane (related structure)
EINECS	Contact for details

Quality Control

Our m-Aminophenyltrimethoxysilane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay and impurity profile analysis by GC and/or HPLC, to ensure it meets precise specifications for industrial and R&D applications. A Certificate of Analysis (COA) detailing purity, identity, and key physical properties is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent hydrolysis and degradation upon contact with atmospheric moisture.

Specification

Item	Specification
Appearance	Clear to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.490 - 1.500
Density (g/mL, 25°C)	1.070 - 1.090

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