Description

3-Aminopropylpentamethyldisiloxane is a bifunctional organosilicon compound featuring a reactive primary amine group and a hydrolytically stable disiloxane backbone. This unique structure makes it a valuable intermediate for introducing amino functionality into silicone polymers and for surface modification applications. It is particularly sought after by manufacturers in the silicone industry, adhesives and sealants sector, and for advanced material science research.

Application

• Silicone Polymer Modification: Acts as a chain extender or crosslinker to introduce amine functionality into silicone resins, rubbers, and fluids, altering their adhesion and compatibility properties.
• Surface Priming Agent: Used as an adhesion promoter to improve the bonding of silicone sealants, coatings, and adhesives to various substrates like metals, glass, and plastics.
• Silylating Agent: Employed to protect amine groups or to modify the surface of inorganic materials (e.g., silica, glass) for enhanced dispersion in organic matrices.
• Pharmaceutical & Cosmetic Intermediates: Serves as a key building block in the synthesis of specialized silicone-based quats and other functional ingredients.
• Nanomaterial Functionalization: Used to graft amino groups onto nanoparticles (e.g., silica, quantum dots) for subsequent bioconjugation or to improve solubility.
• Release Coatings & Molding: A precursor for creating amine-functional release liners or for use in silicone molding applications requiring specific surface energy.

Basic Information

Product Name	3-Aminopropylpentamethyldisiloxane
CAS No.	23029-21-2
Molecular Formula	C8H23NOSi2
Molecular Weight	205.45 g/mol
Synonyms	1,1,1,3,3-Pentamethyl-3-(3-aminopropyl)disiloxane; 3-Aminopropyldimethylsiloxane pentamethyl; (3-Aminopropyl)pentamethyldisiloxane; Aminopropylpentamethyldisiloxane; APMDS; APMDOS; γ-Aminopropylpentamethyldisiloxane; 3-(Dimethyl(1,1,3,3-tetramethyldisiloxanyl)amino)propylamine
EINECS	Contact for details

Quality Control

Our 3-Aminopropylpentamethyldisiloxane is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including assay by GC or titration and impurity profiling, to ensure it meets precise specifications. A Certificate of Analysis (COA) detailing purity, identity, and key physical properties is provided with every shipment to guarantee traceability and consistency for your formulation needs.

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). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) after opening to prevent degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20/D)	1.410 - 1.420
Density (20°C)	0.86 - 0.90 g/mL

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