Description

Dotetracontamethyleicosasiloxane is a high molecular weight, linear polydimethylsiloxane (PDMS) oligomer, distinguished by its precisely defined chain length. This compound is valued for its exceptional thermal stability, low surface tension, and high compressibility, making it a critical performance additive in advanced formulations. It is primarily utilized by manufacturers in the silicone, lubricant, and personal care industries seeking to enhance product durability and functionality under extreme conditions.

Application

• As a high-temperature base fluid or additive in specialty lubricants and greases.
• As a key intermediate or modifier in the synthesis of high-performance silicone resins and elastomers.
• As a spreading agent and emollient in premium cosmetics and personal care products (e.g., creams, lotions).
• As a release agent and flow improver in industrial molding and casting processes.
• As a dielectric fluid or heat transfer medium in specialized electrical and electronic applications.
• As a component in defoamers and antifoaming agents for various industrial processes.
• As a standard or reference material for polymer and silicone research and quality control.

Basic Information

Product Name	Dotetracontamethyleicosasiloxane
CAS No.	150027-00-2
Molecular Formula	C44H132O41Si41
Molecular Weight	~ 3100 g/mol (Contact for exact value)
Synonyms	Polydimethylsiloxane, linear; PDMS, 41-mer; Dimethylsiloxane, 41-unit oligomer; Methyl-terminated polydimethylsiloxane; Silicone oil 41-mer; Eicosasiloxane, dotetracontamethyl-; Linear PDMS (n=41); SH 200 (41 cSt type)
EINECS	Contact for details

Quality Control

Our Dotetracontamethyleicosasiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay by GPC/SEC, viscosity measurement, and verification of key physicochemical properties, to ensure consistency and compliance with agreed specifications. Certificates of Analysis (COA) documenting purity, molecular weight distribution, and other critical parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (GPC)	≥ 95.0% (Main peak)
Viscosity (25°C)	Specification available upon request
Specific Gravity (25°C)	~0.96 - 0.98
Refractive Index (n20D)	~1.403 - 1.405
Water Content	≤ 0.1% (w/w)

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