Description

Decamethylcyclopentasiloxane (CAS NO 541-02-6) is a high-purity, low-viscosity cyclic siloxane fluid. It serves as a versatile intermediate and carrier fluid valued for its excellent volatility and spreading properties. This product is essential for manufacturers in the personal care, pharmaceutical, and industrial sectors seeking reliable performance and consistent quality.

Application

• Personal Care & Cosmetics: Acts as a volatile carrier and emollient in antiperspirants, deodorants, skin creams, and hair care products, providing a non-greasy, silky feel.
• Pharmaceuticals: Used as an excipient in topical formulations and transdermal drug delivery systems due to its skin compatibility and solvent properties.
• Industrial Lubricants & Release Agents: Functions as a base fluid or additive in specialty lubricants and mold release agents for plastics and rubber.
• Chemical Synthesis: Serves as a key intermediate or starting material for the production of silicone polymers, resins, and other organosilicon compounds.
• Cleaning & Polishing Formulations: Employed in automotive and furniture polishes, as well as industrial cleaners, for its quick-drying and gloss-enhancing characteristics.
• Electronics: Used in heat transfer fluids and as a solvent or carrier in the production and cleaning of electronic components.

Basic Information

Product Name	Decamethylcyclopentasiloxane
CAS No.	541-02-6
Molecular Formula	C10H30O5Si5
Molecular Weight	370.77 g/mol
Synonyms	D5; Cyclopentasiloxane, decamethyl-; Decamethylpentacyclosiloxane; Dodecamethylpentasiloxane; Cyclomethicone 5; Dow Corning 345 Fluid; Silicone oil D5; Cyclic Volatile Methyl Siloxane (cVMS); Pentamer
EINECS	208-764-9

Quality Control

Our Decamethylcyclopentasiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC), to ensure it meets high-purity specifications and is free from critical impurities. Certificates of Analysis (COA) documenting identity, assay, and key physical properties are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and open flame. Due to its highly volatile nature, ensure containers are kept tightly sealed when not in use to prevent evaporation and maintain product integrity. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Refractive Index (n20D)	1.396 - 1.398
Specific Gravity (25°C)	0.955 - 0.960
Water Content (KF)	≤ 0.05%

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