Description

Dimethylsiloxane/ Hexamethyldisiloxane/ Methyl Siloxanes is a versatile class of organosilicon compounds, primarily consisting of short-chain linear and cyclic methylsiloxanes. These materials are fundamental building blocks in silicone chemistry, prized for their excellent thermal stability, low surface tension, and high compressibility. They are essential raw materials for manufacturers in the personal care, pharmaceutical, electronics, and industrial lubricant sectors seeking reliable, high-purity intermediates.

Application

• Silicone Fluid & Elastomer Production: Acts as a key monomer and chain terminator in the synthesis of polydimethylsiloxane (PDMS) fluids, gums, and resins.
• Personal Care & Cosmetics: Used as a volatile carrier and emollient in antiperspirants, deodorants, and hair care products, providing a non-greasy, smooth feel.
• Pharmaceuticals: Serves as an excipient in topical formulations and as a processing aid due to its inertness and volatility.
• Electronics & Electrical: Employed as a heat transfer fluid and as a base for dielectric coolants and insulating materials.
• Industrial Lubricants & Release Agents: Functions as a base stock for high-temperature lubricants and as a mold release agent in plastic and rubber manufacturing.
• Chemical Synthesis: Utilized as a solvent and reagent in organic synthesis and as a protecting group in sophisticated chemical processes.
• Cleaning & Polishing: A component in specialty cleaners and polishes for automotive, furniture, and optical applications.
• Defoaming Agents: A primary ingredient in antifoam and defoamer formulations for various industrial processes.

Basic Information

Product Name	Dimethylsiloxane/ Hexamethyldisiloxane/ Methyl Siloxanes
CAS No.	69430-46-2
Molecular Formula	Mixture of (CH3)3SiOSi(CH3)3, [(CH3)2SiO]n
Molecular Weight	Varies by composition
Synonyms	Hexamethyldisiloxane (HMDSO); Octamethyltrisiloxane (MDM); Decamethyltetrasiloxane (MD2M); Dodecamethylpentasiloxane (MD3M); Cyclic Methyl Siloxanes (D3, D4, D5); Low Molecular Weight Methyl Siloxanes; Linear Methylsiloxane Oligomers; Volatile Methyl Siloxanes (VMS); Silicone Fluid MM; Polydimethylsiloxane, low MW
EINECS	Contact for details

Quality Control

Our Dimethylsiloxane/ Hexamethyldisiloxane/ Methyl Siloxanes is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC) for composition and purity, to ensure it meets precise specifications for its intended industrial grade. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and open flame. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to prevent evaporation and minimize moisture absorption.

Specification

Item	Specification
Appearance	Colorless, clear liquid
Identification (IR)	Conforms
Composition (GC)	Meets grade-specific profile
Assay (Hexamethyldisiloxane)	≥ 98.0% (or as per grade)
Water Content (KF)	≤ 0.05%
Refractive Index (20°C)	1.375 - 1.385
Specific Gravity (25°C)	0.760 - 0.780
Flash Point (PMCC)	> 40°C

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