Description

Siloxanes And Silicones, Di-Me, Monohydroxy-Terminated is a specialized organosilicon compound featuring a reactive hydroxyl group at one end of a polydimethylsiloxane (PDMS) chain. This unique monofunctional structure is critical for its role as a chain terminator, modifier, or reactive intermediate in silicone synthesis and polymer engineering. It is essential for manufacturers requiring precise control over polymer molecular weight, viscosity, and end-group functionality. This product is primarily utilized in the production of silicone fluids, elastomers, resins, and as a key ingredient in personal care formulations, release coatings, and industrial lubricants.

Application

• Silicone Polymer & Elastomer Production: Acts as a crucial chain terminator and molecular weight regulator in the synthesis of polydimethylsiloxane (PDMS) fluids, gums, and high-consistency rubber (HCR).
• Personal Care & Cosmetic Ingredients: Serves as a reactive intermediate or modifier in the manufacture of silicone surfactants, emulsifiers, and conditioning agents for shampoos, conditioners, and skin care products.
• Release Coatings & Adhesives: Used as a building block for silicone release liners and pressure-sensitive adhesives (PSAs), providing controlled release properties.
• Lubricants & Greases: Employed in formulating specialty silicone-based lubricants and greases for high-temperature or plastic-compatible applications.
• Surface Treatments & Modifiers: Functions as a precursor for creating hydrophobic or surface-active coatings on textiles, paper, and minerals.
• Pharmaceutical & Medical Grade Silicones: Used as a starting material or intermediate in the synthesis of high-purity silicones for medical devices and drug delivery systems.
• Sealants & Encapsulants: Incorporated into formulations to modify cure profiles and final properties of silicone sealants and electronic encapsulants.

Basic Information

Product Name	Siloxanes And Silicones, Di-Me, Monohydroxy-Terminated
CAS No.	102782-86-5
Molecular Formula	CnH2n+2O2Sin (n variable)
Molecular Weight	Variable (Contact for details on specific chain length/viscosity grade)
Synonyms	α-Hydroxy-ω-methylpoly(dimethylsiloxane)
Monohydroxy Terminated Polydimethylsiloxane
Hydroxy-Terminated PDMS
Poly(dimethylsiloxane), monohydroxy terminated
PDMS-OH
Dimethylsiloxane, hydroxy-terminated
Silicone fluid, monohydroxy functional
EINECS	Contact for details

Quality Control

Our Siloxanes And Silicones, Di-Me, Monohydroxy-Terminated is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in hydroxyl value, viscosity, molecular weight distribution, and purity. Certificates of Analysis (COA) are provided, detailing key parameters such as assay, water content, and acid value. We support compliance with relevant global regulatory frameworks, including REACH.

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 heat, sparks, and open flame. Due to potential moisture sensitivity, containers should be kept tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Complies
Hydroxyl Value	As per grade (Contact for details)
Viscosity @ 25°C	As per grade (cSt)
Assay (OH content)	≥ 98.0%
Water Content	≤ 0.1% (Karl Fischer)
Acid Value	≤ 0.05 mg KOH/g

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