Description

3-Aminopropyltriethylsilane is a versatile organosilicon compound featuring both an amino group and hydrolyzable ethoxy groups on the silicon atom. This bifunctional structure makes it a critical coupling agent and surface modifier, enabling strong adhesion between organic polymers and inorganic substrates. It is essential for manufacturers in the coatings, adhesives, and composites industries seeking to enhance material performance, durability, and interfacial bonding.

Application

• Coupling Agent for Composites: Improves the interfacial adhesion between glass, mineral, or metal fillers and polymer matrices like epoxies, phenolics, and polyamides.
• Surface Modification: Used to functionalize silica, glass, and other metal oxide surfaces to introduce amino groups for further chemical grafting or to alter surface properties.
• Adhesive & Sealant Formulations: Acts as an adhesion promoter in silicone, polyurethane, and epoxy-based systems, particularly for challenging substrates.
• Fiber Sizing: Applied as a key component in sizing formulations for fiberglass and other reinforcing fibers to improve resin compatibility and composite strength.
• Intermediate for Silicone Chemistry: Serves as a precursor for synthesizing more complex aminosilanes, silicone polymers, and specialty surfactants.
• Nanomaterial Functionalization: Used to modify nanoparticles (e.g., silica, quantum dots) to make them dispersible in organic media or to attach biomolecules.

Basic Information

Product Name	3-Aminopropyltriethylsilane
CAS No.	17887-09-1
Molecular Formula	C9H23NOSi
Molecular Weight	189.37 g/mol
Synonyms	3-Aminopropyltriethoxysilane; Triethoxy(3-aminopropyl)silane; APTES; γ-Aminopropyltriethoxysilane; A 1100; KH-550; 3-Triethoxysilylpropylamine; (3-Aminopropyl)triethoxysilane; Silane A 1100
EINECS	241-222-2

Quality Control

Our production of 3-Aminopropyltriethylsilane adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay, purity, and identity confirmation, to ensure it meets precise customer specifications and industry standards. 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) and highly volatile; containers must be kept tightly sealed under dry conditions to prevent moisture absorption and evaporation.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Refractive Index (n20D)	1.420 - 1.425
Density (g/mL, 25°C)	0.940 - 0.950

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