Description

1,3-Di-n-Octyltetramethyldisiloxane is a high-purity organosilicon compound, specifically a linear disiloxane derivative. This chemical serves as a versatile intermediate and functional fluid, valued for its thermal stability and hydrophobic properties. It is essential for manufacturers in the silicone polymer, personal care, and specialty lubricant industries seeking reliable performance modifiers.

Application

• As a reactive intermediate or chain extender in the synthesis of specialty silicone oils and polymers.
• As a base fluid or additive in high-performance lubricants and greases requiring thermal and oxidative stability.
• As an emollient or spreading agent in premium personal care formulations and cosmetics.
• As a hydrophobic agent or surface modifier in coatings and textile treatments.
• As a plasticizer or processing aid for specific elastomers and plastics.
• As a component in release agents and mold-making compounds.
• Potential use as a stationary phase or standard in analytical chromatography.
• As an inert fluid or heat transfer medium in specialized laboratory or industrial processes.

Basic Information

Product Name	1,3-Di-n-Octyltetramethyldisiloxane
CAS No.	18642-94-9
Molecular Formula	C20H46OSi2
Molecular Weight	358.75 g/mol
Synonyms	Di-n-Octyltetramethyldisiloxane; 1,3-Di-n-octyl-1,1,3,3-tetramethyldisiloxane; Octyltetramethyldisiloxane; Disiloxane, 1,1,3,3-tetramethyl-1,3-dioctyl-; Tetramethyl-di-n-octyldisiloxane; Dioctyltetramethyldisiloxane; Linear disiloxane fluid
EINECS	242-458-6

Quality Control

Our 1,3-Di-n-Octyltetramethyldisiloxane is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including GC, IR, and NMR, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to guarantee it meets your technical 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 oxidizing agents, acids, and bases. For long-term storage, consider under an inert atmosphere such as nitrogen to maintain optimal purity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.430 - 1.435
Density (20°C)	0.82 - 0.86 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.