Description

1,13-Dihydroxy Tetradecamethylheptasiloxane is a linear, bifunctional organosilicon compound featuring terminal silanol (Si-OH) groups. This structure is critical as it serves as a versatile building block or chain extender in the synthesis of silicone polymers and copolymers. It is essential for manufacturers in the silicone elastomer, resin, and specialty fluids industries who require precise control over polymer architecture, crosslink density, and material properties.

Application

• Silicone Polymer Synthesis: Acts as a key chain extender or building block in the production of linear polydimethylsiloxanes (PDMS) and silicone copolymers.
• Crosslinking Agent: Used in formulations for room-temperature vulcanizing (RTV) silicones and high-consistency rubber (HCR) to modify cure characteristics and final elastomer properties.
• Surface Modification: Employed as a precursor for creating functionalized surfaces or as a coupling agent to improve adhesion between organic and inorganic materials.
• Specialty Silicone Fluids: A raw material for manufacturing tailored silicone oils with specific terminal functionalities for release agents, lubricants, or dielectric fluids.
• Resin & Coating Formulations: Incorporated into silicone resin systems to adjust flexibility, hardness, and thermal stability for protective coatings and high-temperature paints.
• Research & Development: Serves as a standard or intermediate in chemical research for developing novel siloxane-based materials and hybrid polymers.

Basic Information

Product Name	1,13-Dihydroxy Tetradecamethylheptasiloxane
CAS No.	3195-63-9
Molecular Formula	C14H42O8Si7
Molecular Weight	531.12 g/mol
Synonyms	α,ω-Dihydroxyheptamethyltrisiloxane; Tetradecamethyl-1,13-dihydroxyheptasiloxane; Bis(hydroxy)terminated heptamethyltrisiloxane; Heptamethyltrisiloxane-1,7-diol; HO[(CH3)2SiO]3H; 1,7-Dihydroxyheptamethyltrisiloxane; Silanol-terminated PDMS oligomer (n=3); Linear hydroxy-terminated siloxane trimer
EINECS	221-695-5

Quality Control

Our 1,13-Dihydroxy Tetradecamethylheptasiloxane is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency and meets high-purity standards suitable for industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters 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). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC or Titration)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Viscosity (25°C)	Contact for details
Refractive Index (n20D)	Contact for details
Density (25°C)	Contact for details

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