Description

Methylhydrocyclosiloxanes CAS NO 68037-53-6 are a class of organosilicon compounds characterized by a cyclic structure containing both methyl and hydrogen substituents. These versatile intermediates are crucial for imparting specific properties, such as enhanced reactivity and hydrophobicity, into final silicone products. They are essential raw materials for manufacturers in the silicone polymer, personal care, and specialty coatings industries seeking to modify material performance.

Application

• As a key reactive intermediate in the production of silicone resins and elastomers.
• As a crosslinking agent or chain extender in heat-cured silicone rubber (HCR) and liquid silicone rubber (LSR) formulations.
• In the synthesis of silicone-based surfactants and defoamers for industrial processes.
• As a precursor for modifying surface properties in release coatings and water-repellent treatments.
• In the manufacture of silicone fluids and gels with tailored viscosity and reactivity profiles.
• For research and development of novel hybrid organic-inorganic materials.

Basic Information

Product Name	Methylhydrocyclosiloxanes
CAS No.	68037-53-6
Molecular Formula	Mixture of (CH3HSiO)n isomers
Molecular Weight	Varies by composition (n=3,4,5...)
Synonyms	Cyclic Methylhydrogensiloxanes; Methylhydrogen Cyclosiloxanes; Methylhydrocyclosiloxane Homologs; Cyclic Methylhydrogensiloxane Mixture; MHCS; Methylhydridocyclosiloxanes; Hydrogenmethyl Cyclosiloxanes; CAS 68037-53-6
EINECS	Contact for details

Quality Control

Our Methylhydrocyclosiloxanes are produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent composition, reactivity, and purity suitable for industrial applications. A comprehensive Certificate of Analysis (COA) detailing key parameters such as active hydrogen content, viscosity, and cyclic distribution is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. This product is hygroscopic (moisture-sensitive). To prevent hydrolysis and maintain optimal reactivity, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) after opening. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Active Hydrogen Content	Contact for details
Viscosity (25°C)	Contact for details
Cyclic Distribution (by GC)	Specified per grade
Water Content	< 200 ppm

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