Description

3-Aminopropyltrimethoxysilane is a bifunctional organosilane coupling agent featuring both a reactive amino group and hydrolyzable methoxysilane groups. This dual functionality makes it a critical component for enhancing adhesion between inorganic materials and organic polymers. It is essential for manufacturers in the composites, coatings, and sealants industries seeking to improve mechanical strength, durability, and moisture resistance in their final products.

Application

• As a coupling agent in fiberglass-reinforced plastics and mineral-filled composites to improve mechanical properties.
• As a surface primer or adhesion promoter for paints, inks, and coatings on glass, metals, and concrete substrates.
• In the formulation of silicone sealants and adhesives to enhance bonding and environmental stability.
• For the surface modification of silica, alumina, and other fillers to improve dispersion in polymer matrices.
• As a key intermediate in the synthesis of specialized silane-modified polymers (SMP) and other advanced materials.
• In the production of amino-functionalized silanes for further chemical derivatization.

Basic Information

Product Name	3-Aminopropyltrimethoxysilane
CAS No.	13822-56-5
Molecular Formula	C6H17NO3Si
Molecular Weight	179.29 g/mol
Synonyms	APTMS; (3-Aminopropyl)trimethoxysilane; γ-Aminopropyltrimethoxysilane; 3-(Trimethoxysilyl)propan-1-amine; Silane A-1110; Dynasylan AMMO; KH-540; Amino silane coupling agent
EINECS	237-511-5

Quality Control

Our 3-Aminopropyltrimethoxysilane is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including gas chromatography (GC) for purity and identity confirmation, to ensure it meets precise specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment and is available upon request.

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 contact with atmospheric moisture.

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 (g/mL, 25°C)	1.010 - 1.030

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