Description

Chlorodiisobutyloctadecylsilane CAS NO 162578-86-1 is a high-purity organosilicon compound featuring a long alkyl chain and a reactive chlorosilane group. This unique structure makes it a valuable intermediate for introducing hydrophobic, long-chain alkyl groups onto surfaces or into polymer matrices. It is primarily sought after by manufacturers in the specialty chemicals and advanced materials sectors for applications requiring surface modification, coupling, or hydrophobization. Its utility spans from creating release coatings to modifying fillers and synthesizing custom silicone derivatives.

Application

• Surface Modification Agent: Used to hydrophobize inorganic fillers like silica, alumina, or glass fibers to improve their compatibility with organic polymer matrices.
• Silicone Intermediate: Serves as a key building block in the synthesis of custom silicone oils, resins, and elastomers with specific long-chain alkyl properties.
• Release Coating Formulations: Employed in the production of silicone-based release liners for labels, tapes, and adhesive applications.
• Water Repellent Treatments: Acts as a precursor for creating durable water-repellent coatings on textiles, paper, and construction materials.
• Coupling Agent: Functions as an adhesion promoter between organic and inorganic phases in composite materials and sealants.
• Lubricant Additive: Utilized as a component in specialty lubricants and greases to enhance film strength and surface affinity.

Basic Information

Product Name	Chlorodiisobutyloctadecylsilane
CAS No.	162578-86-1
Molecular Formula	C26H55ClSi
Molecular Weight	431.26 g/mol
Synonyms	Octadecyldiisobutylchlorosilane; Diisobutyloctadecylchlorosilane; Chloro(diisobutyl)octadecylsilane; Silane, chlorodiisobutyloctadecyl-; Di-tert-butyloctadecylchlorosilane (common naming variant); C18-Alkylchlorosilane; Long-chain alkylchlorosilane
EINECS	Contact for details

Quality Control

Our Chlorodiisobutyloctadecylsilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay by GC or titration and identification by FT-IR, to ensure high chemical purity and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical specifications. Our quality commitment ensures the material meets the stringent requirements for use in advanced material synthesis and industrial applications.

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 compound is hygroscopic (moisture-sensitive); containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent hydrolysis. Keep away from strong bases, oxidizers, and sources of ignition.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Chlorine Content	7.8 - 8.4 %
Density (25°C)	0.86 - 0.88 g/mL
Refractive Index (n20/D)	1.455 - 1.465

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