Description

1,1,3,3,5,5-Hexamethyltrisiloxane-1,5-Diol is a specialized organosilicon compound featuring a central siloxane backbone terminated with hydroxyl groups, making it a valuable reactive intermediate. This structure is critical for its role as a chain extender, crosslinker, or building block in the synthesis of advanced silicone polymers and resins. It is essential for manufacturers in the silicone industry seeking to modify polymer architecture, enhance material properties, or develop novel functional materials.

Application

• Silicone Polymer Synthesis: Acts as a key chain extender or crosslinking agent in the production of custom silicone elastomers, resins, and fluids.
• Surface Modification: Used to create silane coupling agents or surface treatments to improve adhesion between organic and inorganic materials.
• Personal Care & Cosmetics: Serves as a precursor for silicone-based ingredients like dimethicone copolyols, providing emolliency and conditioning in formulations.
• Pharmaceutical Intermediates: Employed in the synthesis of specialized siloxane-containing compounds for drug delivery or medical device coatings.
• Release Coatings & Adhesives: A building block for silicone release liners and pressure-sensitive adhesives requiring precise control of release force.
• Water Repellents: Utilized in the development of water-resistant coatings for textiles, construction materials, and electronics.

Basic Information

Product Name	1,1,3,3,5,5-Hexamethyltrisiloxane-1,5-Diol
CAS No.	3663-50-1
Molecular Formula	C6H22O4Si3
Molecular Weight	254.50 g/mol
Synonyms	Hexamethyltrisiloxane-1,5-diol; 1,5-Dihydroxyhexamethyltrisiloxane; 1,1,3,3,5,5-Hexamethyltrisiloxane-1,5-diol; α,ω-Dihydroxyhexamethyltrisiloxane; Bis(hydroxydimethylsilyl)dimethylsiloxane; Dihydroxyhexamethyltrisiloxane; HMTS-diol; Silanol-terminated hexamethyltrisiloxane
EINECS	Contact for details

Quality Control

Our 1,1,3,3,5,5-Hexamethyltrisiloxane-1,5-Diol is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including Gas Chromatography (GC) and NMR to verify identity, assay, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all specifications is 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 an inert atmosphere (e.g., nitrogen) to prevent moisture absorption and degradation. Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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