Description

1,11-Dihydroxy Dodecamethyl Hexasiloxane is a bifunctional organosilicon compound characterized by its reactive terminal hydroxyl groups. This structure makes it a valuable intermediate for the synthesis of more complex silicone polymers and for modifying material surfaces. It is primarily utilized by manufacturers in the silicone industry, specialty chemical producers, and R&D laboratories. Its properties are essential for creating tailored materials with specific performance characteristics.

Application

• As a key chain extender or crosslinking agent in the synthesis of silicone resins, elastomers, and rubbers.
• As a surface-modifying agent to introduce siloxane functionality, improving hydrophobicity, release properties, or compatibility in coatings and composites.
• As a reactive intermediate for producing specialty silicone polyethers, alkoxysilanes, or other functional siloxanes.
• In the formulation of adhesives, sealants, and potting compounds to enhance flexibility and environmental resistance.
• For research and development of novel hybrid organic-inorganic materials (ORMOSILs) with tailored properties.
• Potential use as a precursor in the manufacture of personal care ingredients such as silicone emulsifiers or conditioning agents.

Basic Information

Product Name	1,11-Dihydroxy Dodecamethyl Hexasiloxane
CAS No.	4029-00-9
Molecular Formula	C12H38O7Si6
Molecular Weight	467.00 g/mol
Synonyms	Hexasiloxane, 1,1,1,3,3,5,5,7,7,9,9,11,11-tridecamethyl-6,12-dihydroxy-; α,ω-Dihydroxydodecamethylhexasiloxane; Dihydroxy-terminated polydimethylsiloxane (DP~3); Bis(hydroxy)-terminated hexamer; 1,11-Dihydroxydodecamethylhexasiloxane; Hydroxy-terminated PDMS (low MW); Silanol-terminated hexasiloxane; DMS-D15
EINECS	223-710-4

Quality Control

Our 1,11-Dihydroxy Dodecamethyl Hexasiloxane is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency and meets high-purity standards. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with every shipment and is available upon request.

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 moisture absorption and degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (by GC or Titration)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.400 - 1.405
Density (g/mL at 20°C)	0.96 - 0.98

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