Description

Aminopropylsilanetriol is a highly reactive organosilicon compound, a key intermediate in the synthesis of advanced silane coupling agents. Its unique structure, featuring three hydrolyzable silanol groups and a primary amine functionality, provides exceptional bifunctional reactivity for surface modification and cross-linking applications. This product is essential for manufacturers in the adhesives, sealants, coatings, and composite materials industries seeking to enhance interfacial bonding between organic polymers and inorganic substrates.

Application

• Silane Coupling Agent Precursor: Serves as a critical intermediate for manufacturing a wide range of aminosilane coupling agents used in fiberglass, mineral wool, and filler treatments.
• Surface Modification: Used to functionalize the surface of silica, glass, metals, and other inorganic materials to improve adhesion with epoxy, phenolic, and polyurethane resins.
• Adhesives & Sealants: Acts as an adhesion promoter and cross-linking agent in high-performance silicone, epoxy, and acrylic-based formulations.
• Composite Materials: Enhances the mechanical properties and moisture resistance of polymer composites by improving the matrix-filler interface.
• Coatings & Inks: Improves the scratch resistance, corrosion protection, and substrate wetting of industrial and protective coatings.
• Chromatography & Life Sciences: Utilized in the preparation of stationary phases for chromatography and as a linker for biomolecule immobilization on solid supports.

Basic Information

Product Name	Aminopropylsilanetriol
CAS No.	29159-37-3
Molecular Formula	C3H11NO3Si
Molecular Weight	137.21 g/mol
Synonyms	3-Aminopropylsilanetriol; (3-Aminopropyl)trihydroxysilane; 3-Aminopropyltrihydroxysilane; γ-Aminopropyltrihydroxysilane; APST; APTRIOL; Silane, trihydroxy(3-aminopropyl)-; Aminopropyltrihydroxysilane
EINECS	249-449-7

Quality Control

Our Aminopropylsilanetriol is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive analytical testing, including assay by titration and identification by FT-IR spectroscopy. Certificates of Analysis (COA) detailing purity, moisture content, and other critical parameters are supplied 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, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to prevent degradation and moisture absorption.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (Aminopropylsilanetriol)	≥ 95.0 %
Water Content (Karl Fischer)	≤ 1.0 %
Refractive Index (n20D)	1.420 - 1.440
Density (20°C)	1.10 - 1.20 g/cm³

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