Description

Silane, Dimethyl(Octadecyloxy)Propyl- is a specialized organosilicon compound, specifically a long-chain alkyl-functional silane coupling agent. This chemical matters for its unique ability to modify surfaces and interfaces, creating durable bonds between inorganic substrates and organic polymers. It is primarily needed by manufacturers in the coatings, plastics, and composites industries seeking to enhance material properties like adhesion, hydrophobicity, and dispersion.

Application

• As a coupling agent in mineral-filled polymer composites (e.g., polyolefins, engineering plastics) to improve mechanical strength and moisture resistance.
• As a surface modifier for inorganic pigments and fillers (silica, clay, talc) to enhance dispersion in organic matrices and reduce viscosity.
• To impart hydrophobic and oleophobic properties to surfaces in protective coatings, textiles, and paper treatments.
• In the formulation of adhesion promoters for primers and sealants, particularly on metallic or glass surfaces.
• As a crosslinking agent or modifier in silicone rubber and resin systems to tailor rheological and release properties.
• For the functionalization of nanoparticles to improve compatibility in advanced material applications.

Basic Information

Product Name	Silane, Dimethyl(Octadecyloxy)Propyl-
CAS No.	65597-99-1
Molecular Formula	C23H50O2Si
Molecular Weight	386.73 g/mol
Synonyms	3-(Dimethyloctadecyloxysilyl)-1-propanol; Octadecyloxypropyldimethylsilanol; (3-Hydroxypropyl)dimethyloctadecyloxysilane; Dimethyl(octadecyloxy)(3-hydroxypropyl)silane; Silane, (3-hydroxypropyl)dimethyloctadecyloxy-; Propylsilane, dimethyl(octadecyloxy)-; ODS Silane Coupling Agent; Long-chain alkyl alkoxy silane
EINECS	Contact for details

Quality Control

Our Silane, Dimethyl(Octadecyloxy)Propyl- is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency and meets high-purity standards typical for coupling agent applications. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment.

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); containers must be kept sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC or Titration)	≥ 95.0%
Refractive Index (n20D)	1.440 - 1.450
Density (g/mL at 20°C)	0.86 - 0.90
Water Content (KF)	≤ 0.5%

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