Description

1,1,1,3,3-Pentamethyl-3-Phenyldisiloxane is a specialized organosilicon compound featuring a unique disiloxane backbone with phenyl and methyl substituents. This structure provides a valuable combination of thermal stability and organic compatibility, making it a versatile intermediate in advanced material synthesis. It is primarily sought after by manufacturers in the silicone polymer, specialty chemical, and electronics industries for developing high-performance materials.

Application

• Silicone Resin & Polymer Modification: Acts as a key building block or end-capping agent for synthesizing phenyl-containing silicone resins, enhancing their thermal stability, refractive index, and compatibility with organic matrices.
• Adhesive & Sealant Formulations: Used as a crosslinking agent or additive to improve the adhesion, flexibility, and environmental resistance of high-performance silicone adhesives and sealants.
• Electronic Encapsulants & Potting Compounds: Serves as a precursor for silicones used in protecting sensitive electronic components, offering excellent dielectric properties and thermal endurance.
• Release Coatings & Molding Agents: Employed in the production of silicone-based release coatings for industrial tapes, labels, and as a component in mold-making materials.
• Specialty Surfactants & Surface Modifiers: Utilized to create silicone surfactants for polyurethane foam or as a surface treatment agent to modify material hydrophobicity.
• Pharmaceutical & Cosmetic Intermediates: Functions as a synthetic intermediate for producing siloxane-based compounds used in specific drug delivery systems or cosmetic ingredients.
• Research & Development (R&D): A valuable reagent for academic and industrial R&D in organosilicon chemistry and new material discovery.

Basic Information

Product Name	1,1,1,3,3-Pentamethyl-3-Phenyldisiloxane
CAS No.	14920-92-4
Molecular Formula	C11H20OSi2
Molecular Weight	224.45 g/mol
Synonyms	Phenyldisiloxane, 1,1,1,3,3-pentamethyl-3-; 3-Phenyl-1,1,1,3,3-pentamethyldisiloxane; Pentamethylphenyl Disiloxane; Disiloxane, 1,1,1,3,3-pentamethyl-3-phenyl-; Phenylpentamethyldisiloxane; PMPDS; (Phenyl)(pentamethyldisiloxy)silane; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our 1,1,1,3,3-Pentamethyl-3-Phenyldisiloxane is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure high purity and consistent performance. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key specifications such as assay, identity, and impurity profiles. Our quality systems are designed to meet the stringent requirements of industrial and R&D applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents, strong acids, and strong bases. The container should be kept tightly sealed when not in use to minimize moisture uptake and prevent contamination.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.460 - 1.470
Density (g/mL, 25°C)	0.92 - 0.96

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