Description

Dodecamethylpentasiloxane is a linear, low molecular weight organosilicon compound belonging to the polydimethylsiloxane (PDMS) family. It serves as a versatile intermediate and functional fluid, prized for its excellent thermal stability, low surface tension, and high compressibility. This product is essential for manufacturers in the personal care, electronics, and specialty chemical industries seeking reliable performance in formulations and processes.

Application

• Personal Care & Cosmetics: Acts as a volatile carrier, emollient, and solvent in antiperspirants, deodorants, and skin care products due to its smooth, non-greasy feel and evaporation without residue.
• Release Agents & Lubricants: Used as a component in mold release formulations for plastics, rubber, and composites, and as a lubricant in precision mechanical applications.
• Electronics & Electrical: Employed as a heat transfer fluid or dielectric coolant in specialized thermal management systems.
• Chemical Intermediate: Serves as a key building block for the synthesis of more complex silicone polymers, resins, and modified siloxanes.
• Surface Treatment: Provides water repellency and modifies surface properties as a treatment agent for textiles, paper, and minerals.
• Industrial Defoamers: Functions as an active component or carrier in antifoam and defoamer formulations for various process industries.

Basic Information

Product Name	Dodecamethylpentasiloxane
CAS No.	141-63-9
Molecular Formula	C12H36O4Si5
Molecular Weight	384.84 g/mol
Synonyms	Hexamethyldisiloxane, Trimethylsilyl Terminated; MD3M; Polydimethylsiloxane, trimethylsilyl terminated; Dimethylsiloxane pentamer; 1,1,1,3,3,5,5,7,7,9,9,9-Dodecamethylpentasiloxane; L2 Silicone Fluid; Linear PDMS (n=3)
EINECS	205-492-5

Quality Control

Our Dodecamethylpentasiloxane is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including gas chromatography (GC) for purity and identity confirmation, to ensure it meets precise specifications for its intended industrial applications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

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 oxidizing agents, acids, and bases. The product is not classified as hygroscopic under normal conditions.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 98.0%
Refractive Index (20°C)	1.389 - 1.393
Density (25°C)	0.855 - 0.865 g/mL
Viscosity (25°C)	Approx. 1.5 - 2.5 cSt
Water Content (KF)	≤ 0.05%

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