Description

Polydimethylsiloxane CAS NO 8050-81-5 is a versatile silicone polymer, widely recognized for its exceptional thermal stability, low surface tension, and excellent dielectric properties. This inert, non-toxic material is a critical component in countless industrial formulations, offering reliable performance across extreme temperature ranges. It is essential for manufacturers in the personal care, pharmaceutical, food processing, and industrial lubricant sectors seeking to enhance product functionality and process efficiency.

Application

• Antifoaming & Defoaming Agent: A primary ingredient in antifoam concentrates for wastewater treatment, fermentation processes, pulp and paper production, and food processing.
• Personal Care & Cosmetics: Used as an emollient and conditioning agent in skin creams, lotions, hair care products, sunscreens, and antiperspirants for a smooth, non-greasy feel.
• Pharmaceuticals: Employed as an active ingredient in anti-flatulence medications (simethicone) and as an excipient in topical ointments and controlled-release drug delivery systems.
• Food Grade Additive: Approved as a food additive (E900) for use as an antifoaming agent in cooking oils, fruit juices, and various food production processes.
• Industrial Lubricants & Greases: Serves as a base fluid for high- and low-temperature greases, mold release agents, and dielectric coolants.
• Caulks, Sealants & Adhesives: A key component in silicone-based sealants and adhesives, providing durability, flexibility, and water resistance.
• Textile & Leather Processing: Applied as a softener, water repellent, and fiber lubricant to improve fabric hand feel and performance.
• Paints & Coatings: Used as a flow and leveling additive to improve surface smoothness and reduce defects in paint films.

Basic Information

Product Name	Polydimethylsiloxane
CAS No.	8050-81-5
Molecular Formula	(C2H6OSi)n
Molecular Weight	Varies by viscosity grade
Synonyms	Dimethyl Silicone Oil; Dimethylpolysiloxane; PDMS; Dimethicone; Polydimethylsiloxane Fluid; Silicone Oil 200; Methyl Silicone Fluid; Poly(dimethylsiloxane); α-Methyl-ω-methoxypolydimethylsiloxane; E900
EINECS	232-485-7

Quality Control

Our Polydimethylsiloxane is manufactured under a strict quality management system. Production adheres to relevant industry standards, including FDA 21 CFR for food and pharmaceutical grades and REACH compliance. Each batch undergoes rigorous analytical testing to ensure consistent purity, viscosity, and performance. A comprehensive Certificate of Analysis (COA) documenting key specifications is available for every shipment.

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). Keep away from strong oxidizing agents and open flames. For long-term storage under inert atmosphere, please contact us for specific recommendations.

Specification

Item	Specification
Appearance	Colorless, clear viscous liquid
Identification (IR)	Conforms to standard
Viscosity (25°C)	10 - 100,000 cSt (Grade Dependent)
Specific Gravity (25°C)	0.96 - 0.98
Refractive Index (25°C)	1.400 - 1.405
Flash Point	> 300 °C
Volatile Matter	< 1.0%

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