Description

Diethylphosphatoethyltriethoxysilane is a multifunctional organosilane coupling agent that combines phosphonate and alkoxysilane functionalities in a single molecule. This unique structure makes it a critical component for enhancing adhesion, durability, and corrosion resistance in composite materials and coatings. It is primarily used by manufacturers in the paints & coatings, adhesives & sealants, and advanced composite materials industries to improve the bonding between inorganic substrates and organic polymers.

Application

• As a coupling agent and adhesion promoter in paints, primers, and industrial coatings for metals, glass, and concrete.
• To enhance the mechanical properties and moisture resistance of fiberglass-reinforced plastics (FRP) and composite materials.
• As a key additive in adhesives and sealants to improve bonding strength and long-term durability.
• For surface treatment of mineral fillers and pigments to improve their dispersion and compatibility in polymer matrices.
• In the formulation of corrosion-inhibiting coatings for automotive and aerospace components.
• As a crosslinking agent or co-monomer in the synthesis of specialty silicon-based polymers and resins.

Basic Information

Product Name	Diethylphosphatoethyltriethoxysilane
CAS No.	757-44-8
Molecular Formula	C12H29O6PSi
Molecular Weight	328.41 g/mol
Synonyms	Diethyl P-[2-(Triethoxysilyl)ethyl] Phosphonate; (Triethoxysilyl)ethyl Diethyl Phosphonate; 2-(Diethoxyphosphoryl)ethyltriethoxysilane; Diethyl 2-(Triethoxysilyl)ethyl Phosphonate; Silane A-1106 (Trade Name); Phosphonatoethyltriethoxysilane; P,P-Diethyl P'-[2-(Triethoxysilyl)ethyl] Phosphonate
EINECS	212-048-3

Quality Control

Our Diethylphosphatoethyltriethoxysilane is manufactured under strict process controls to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including assay by GC or HPLC and verification of key functional groups. Certificates of Analysis (COA) documenting purity, identity, and other critical parameters are provided with every shipment to support your quality assurance protocols.

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). Keep the container tightly sealed under a dry, inert atmosphere (e.g., nitrogen) to prevent hydrolysis and degradation upon contact with atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.430 - 1.440
Density (20°C)	1.070 - 1.090 g/mL

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