Description

1,3-Di-n-Butyltetramethyldisiloxane is a high-purity organosilicon compound, specifically a linear disiloxane derivative, valued for its role as a versatile chemical intermediate and functional fluid component. Its molecular structure, featuring two butyl groups and two methyl groups bonded to a disiloxane backbone, provides unique properties such as low surface tension, thermal stability, and hydrophobicity. This makes it a critical material for manufacturers in the silicone polymer, specialty lubricant, and personal care industries seeking to modify product performance.

Application

• Silicone Intermediate: A key building block (chain extender or endblocker) in the synthesis of custom silicone oils, resins, and elastomers.
• Lubricant & Grease Formulation: Used as a base fluid or additive in high-performance synthetic lubricants and greases for extreme temperature applications.
• Personal Care & Cosmetics: Functions as an emollient and spreading agent in skincare, haircare, and cosmetic formulations to enhance texture and feel.
• Release Agent Production: Serves as a precursor in manufacturing silicone-based mold release agents for plastics, rubber, and composite materials.
• Water Repellent Coatings: Imparts hydrophobic characteristics to surface treatments for textiles, paper, and construction materials.
• Pharmaceutical Intermediates: Employed in the synthesis of specialized organosilicon compounds for pharmaceutical research and development.
• Electronics Industry: Used in heat transfer fluids or as a component in protective coatings for electronic assemblies.

Basic Information

Product Name	1,3-Di-n-Butyltetramethyldisiloxane
CAS No.	4619-08-3
Molecular Formula	C12H30OSi2
Molecular Weight	246.54 g/mol
Synonyms	1,3-Dibutyl-1,1,3,3-tetramethyldisiloxane; Dibutyltetramethyldisiloxane; n-Butyltetramethyldisiloxane; Tetramethyldibutyldisiloxane; Disiloxane, 1,3-dibutyl-1,1,3,3-tetramethyl-; DBTMDS; HMDS derivative; Butyl-terminated disiloxane
EINECS	Contact for details

Quality Control

Our 1,3-Di-n-Butyltetramethyldisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC) and Nuclear Magnetic Resonance (NMR), to ensure high chemical purity and consistency. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available for every shipment 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, strong acids, and strong bases. The container should be kept tightly sealed when not in use to prevent moisture absorption and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Refractive Index (n20/D)	1.410 - 1.415
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.