Description

Tetracontamethylnonadecasiloxane is a high molecular weight linear siloxane polymer, a key member of the silicone fluids family. This compound is valued for its exceptional thermal stability, low surface tension, and inert chemical nature, making it a versatile performance additive and base material. It is primarily utilized in industries requiring advanced lubricants, release agents, and specialized polymer modifiers, such as plastics manufacturing, high-temperature processing, and precision engineering.

Application

• As a high-temperature base fluid or additive for specialty lubricants and greases.
• As a mold release agent in plastics, rubber, and composite material manufacturing.
• As a flow control and leveling agent in coatings and inks.
• As a plasticizer and processing aid for high-performance elastomers and plastics.
• As a dielectric fluid or coolant in specific electrical and electronic applications.
• As a intermediate for the synthesis of more complex silicone copolymers and functionalized siloxanes.
• In personal care formulations as a non-greasy emollient and conditioner (subject to appropriate grade and certification).

Basic Information

Product Name	Tetracontamethylnonadecasiloxane
CAS No.	150026-99-6
Molecular Formula	C40H122O19Si21
Molecular Weight	1564.0 g/mol (approx.)
Synonyms	Polydimethylsiloxane, PDMS (specific chain length); Dimethylsiloxane, methyl-terminated; Linear methyl siloxane; Silicone oil (specific grade); Decamethyltetrasiloxane, polymer homolog; Methylsilicone fluid; Dow Corning 200 Fluid (analogous); Xiameter PMX-200 Silicone Fluid (analogous)
EINECS	Contact for details

Quality Control

Our Tetracontamethylnonadecasiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent purity, viscosity, and performance characteristics. Certificates of Analysis (COA) documenting key parameters such as assay, viscosity, refractive index, and volatile content are available upon request. We adhere to relevant industry standards and can provide material tailored to specific application requirements.

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 acids and organic solvents. For long-term storage, consider using an inert gas blanket to minimize oxidative degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Viscosity (25°C)	Contact for details
Refractive Index (n20D)	Contact for details
Density (25°C)	~0.96 g/mL
Volatile Matter	≤ 1.0%
Water Content (KF)	≤ 0.1%

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