Description

3-Aminopropyltrimethylsilane is a bifunctional organosilicon compound featuring both a reactive primary amino group and hydrolyzable trimethylsilyl groups. This unique structure makes it a highly versatile coupling agent and surface modifier, bridging organic polymers with inorganic substrates. It is essential for manufacturers in the adhesives, coatings, composites, and electronics industries seeking to enhance material compatibility, adhesion, and performance.

Application

• Silane Coupling Agent: Used to improve the adhesion and compatibility between organic polymers (e.g., epoxies, polyurethanes) and inorganic materials like glass, metals, and minerals in composites and coatings.
• Surface Modification: Functionalizes silica, glass fibers, and other fillers to increase dispersion in polymer matrices and enhance mechanical properties.
• Adhesives & Sealants: Acts as an adhesion promoter, particularly for silicone-based formulations and primers on difficult-to-bond substrates.
• Pharmaceutical & Biochemical Intermediates: Serves as a key building block for synthesizing drug delivery systems, diagnostic agents, and functionalized biomaterials.
• Electronics & Semiconductor Processing: Used in the surface treatment of wafers and as a precursor for dielectric layers and protective coatings.
• Nanomaterial Functionalization: Modifies the surface of nanoparticles (e.g., silica, quantum dots) to introduce amino groups for further chemical grafting.
• Textile & Fiber Treatment: Imparts durable water repellency, softness, and dyeability to natural and synthetic fibers.
• Resin & Plastic Additive: Incorporated to modify rheology, reduce viscosity, or act as an internal mold release agent.

Basic Information

Product Name	3-Aminopropyltrimethylsilane
CAS No.	18187-14-9
Molecular Formula	C6H17NSi
Molecular Weight	131.29 g/mol
Synonyms	3-(Trimethylsilyl)propylamine; (3-Aminopropyl)trimethylsilane; Trimethylsilylpropylamine; γ-Aminopropyltrimethylsilane; APTMS; A 1110 (common trade name); 3-Trimethylsilyl-1-propanamine; N-(3-Trimethylsilylpropyl)amine
EINECS	242-060-2

Quality Control

Our 3-Aminopropyltrimethylsilane is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and titration methods, to ensure high purity and consistency. Certificates of Analysis (COA) detailing specific batch results are available upon request to support your quality assurance and regulatory compliance needs.

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 and highly volatile nature, containers must be kept tightly sealed under a dry 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
Assay (GC)	≥ 98.0%
Density (20°C)	0.83 - 0.87 g/mL
Refractive Index (n20D)	1.420 - 1.425
Moisture (Karl Fischer)	≤ 0.5%

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