Description

Pentasiloxane, 1,1,3,3,5,5,7,7,9,9-Decamethyl- is a high-purity, linear organosilicon compound belonging to the volatile methylsiloxane (VMS) family. This product is valued for its excellent volatility, thermal stability, and hydrophobic properties, making it a versatile intermediate and functional fluid. It is primarily used in the formulation of personal care products, industrial lubricants, and as a precursor in silicone chemistry. Our supply ensures consistent quality and reliable availability for global industrial and specialty chemical applications.

Application

• Personal Care & Cosmetics: Acts as a volatile carrier and emollient in antiperspirants, deodorants, and skin care formulations, providing a dry, non-greasy feel.
• Industrial Lubricants & Release Agents: Serves as a base fluid or additive in specialty lubricants, mold release agents, and dielectric fluids due to its thermal stability and low surface tension.
• Silicone Intermediate: Used as a key building block or chain extender in the synthesis of more complex silicone polymers, resins, and elastomers.
• Cleaning & Polishing Formulations: Incorporated into automotive and industrial cleaners, polishes, and protectants for its spreading and gloss-enhancing properties.
• Coatings & Inks: Functions as a flow and leveling agent or a hydrophobic modifier in high-performance coatings and printing inks.
• Laboratory & Research: Employed as a reference standard, solvent, or reaction medium in chemical research and analytical laboratories.

Basic Information

Product Name	Pentasiloxane, 1,1,3,3,5,5,7,7,9,9-Decamethyl-
CAS No.	995-83-5
Molecular Formula	C10H30O4Si5
Molecular Weight	370.77 g/mol
Synonyms	Decamethylpentasiloxane; MD5M; Pentamer; Linear Pentasiloxane; D5 (Note: Often confused with Decamethylcyclopentasiloxane, CAS 541-02-6); 1,1,3,3,5,5,7,7,9,9-Decamethylpentasiloxane; L5; Me10Si5O4
EINECS	213-627-9

Quality Control

Our Pentasiloxane, 1,1,3,3,5,5,7,7,9,9-Decamethyl- is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. Production adheres to ISO 9001 quality management standards. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key parameters such as assay, identity, and impurity profile. Certificates 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 at room temperature (15-25°C). Keep away from strong bases and incompatible materials such as strong oxidizing agents. The container should be kept tightly sealed when not in use to prevent moisture absorption and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 98.0%
Refractive Index (n20D)	1.3890 - 1.3930
Density (20°C)	0.915 - 0.925 g/mL
Water Content (KF)	≤ 0.1%

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