Description

Triethoxysilylundecanal, Ethylene Glycol Acetal is a specialized organosilane coupling agent featuring a protected aldehyde functional group. This compound is engineered to provide superior hydrolytic stability and controlled reactivity, making it a critical intermediate for advanced material synthesis. It is essential for manufacturers in the silicone, polymer, and surface modification industries seeking to enhance adhesion, cross-linking, and functionalization properties.

Application

• As a key adhesion promoter and coupling agent in silicone sealants, adhesives, and rubber compounds.
• Surface modification of inorganic fillers (e.g., silica, glass) to improve compatibility and dispersion in polymer matrices.
• Intermediate for the synthesis of functionalized silanes with tailored properties for coatings and resins.
• Used in the preparation of specialty polymers and hybrid organic-inorganic materials (ORMOSILs).
• Cross-linking agent in moisture-curable systems where controlled release of the aldehyde functionality is required.
• Surface treatment for nanoparticles to enable specific bio-conjugation or further chemical grafting.

Basic Information

Product Name	Triethoxysilylundecanal, Ethylene Glycol Acetal
CAS No.	866935-66-2
Molecular Formula	C19H40O5Si
Molecular Weight	376.61 g/mol
Synonyms	11-(1,3-Dioxolan-2-yl)undecyltriethoxysilane; 2-[11-(Triethoxysilyl)undecyl]-1,3-dioxolane; Undecyltriethoxysilane ethylene glycol acetal; (11-(1,3-Dioxolan-2-yl)undecyl)triethoxysilane; Aldehyde-protected undecenyltriethoxysilane; Acetal-protected long-chain alkoxysilane; Functional silane coupling agent
EINECS	Contact for details

Quality Control

Our production of Triethoxysilylundecanal, Ethylene Glycol Acetal adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including chromatography and spectroscopy, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided to guarantee the material meets your precise application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 95.0%
Refractive Index (n20D)	1.430 - 1.440
Density (20°C)	0.95 - 0.98 g/mL

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