Description

Docosamethyldecasiloxane is a linear, fully methylated siloxane oligomer, a member of the polydimethylsiloxane (PDMS) family. This high-purity silicone fluid is valued for its excellent thermal stability, low surface tension, and inert chemical properties, making it a versatile intermediate and functional fluid. It is primarily utilized by manufacturers in the personal care, industrial lubricant, and specialty chemical sectors seeking reliable performance modifiers.

Application

• As a base fluid or additive in high-temperature silicone greases and lubricants.
• As a key intermediate in the synthesis of higher molecular weight silicones and modified siloxanes.
• As a spreading agent and emollient in premium cosmetic and personal care formulations (e.g., creams, lotions).
• As a dielectric coolant or heat transfer fluid in specialized electrical and electronic applications.
• As a release agent and mold lubricant in plastics, rubber, and composite manufacturing.
• As a water repellent and surface treatment agent for textiles and construction materials.
• As a defoamer component in industrial processes such as pulp/paper and wastewater treatment.
• As a solvent or carrier fluid in specialty chemical applications requiring high purity and stability.

Basic Information

Product Name	Docosamethyldecasiloxane
CAS No.	556-70-7
Molecular Formula	C22H66O9Si10
Molecular Weight	723.56 g/mol
Synonyms	Decamethyltetrasiloxane (common misnomer for the 10-silicon chain); MD10M; Polydimethylsiloxane, trimethylsiloxy terminated (n=9); Dimethylsiloxane, trimethylsiloxy terminated; Linear PDMS (n=9); Silicone oil 10 cSt (specific grade); Tetrasiloxane, decamethyl- (related to shorter chain); 1,1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17,19,19,21,21-Tricosamethylhendecasiloxane (IUPAC-style)
EINECS	209-136-1

Quality Control

Our Docosamethyldecasiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting key parameters 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 oxidizing agents, strong acids, and strong bases. Under these conditions, the product has excellent long-term stability.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms to standard
Assay (GC)	≥ 98.0%
Refractive Index (20°C)	1.398 - 1.402
Density (20°C)	0.95 - 0.97 g/mL
Viscosity (25°C)	9 - 11 cSt
Flash Point	> 150 °C
Water Content (KF)	≤ 0.05%

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