Description

1,3-Bis(4-Hydroxybutyl)Tetramethyldisiloxane is a bifunctional organosilicon compound featuring terminal hydroxyl groups on flexible butyl chains, connected by a central disiloxane linkage. This unique structure makes it a versatile intermediate for synthesizing silicone-based polymers, offering excellent chain flexibility and reactivity for cross-linking. It is primarily sought by manufacturers in the personal care, coatings, adhesives, and specialty polymer industries for developing advanced silicone elastomers, surfactants, and release agents.

Application

• Silicone Polymer Synthesis: A key monomer for producing linear and cross-linked silicone polymers, polyethersiloxanes, and silicone polyols.
• Personal Care Formulations: Used as a building block for silicone emulsifiers and conditioning agents in shampoos, conditioners, and skin creams.
• Release Coatings: Serves as a precursor for silicone release liners used in pressure-sensitive adhesive tapes and labels.
• Adhesives & Sealants: Incorporated to modify the flexibility, adhesion, and durability of silicone-based adhesive systems.
• Surface Treatments: Utilized in the synthesis of compounds for imparting water repellency and improved surface slip to textiles and fibers.
• Pharmaceutical Intermediates: Acts as a starting material for synthesizing specialized siloxane-based excipients or drug delivery agents.

Basic Information

Product Name	1,3-Bis(4-Hydroxybutyl)Tetramethyldisiloxane
CAS No.	5931-17-9
Molecular Formula	C12H30O3Si2
Molecular Weight	278.54 g/mol
Synonyms	1,3-Bis(4-hydroxybutyl)-1,1,3,3-tetramethyldisiloxane; Tetramethyl-1,3-bis(4-hydroxybutyl)disiloxane; α,ω-Bis(4-hydroxybutyl)tetramethyldisiloxane; Bis(4-hydroxybutyl)tetramethyldisiloxane; Hydroxybutyl-terminated polydimethylsiloxane (low MW); Disiloxane, 1,3-bis(4-hydroxybutyl)-1,1,3,3-tetramethyl-; HO-(CH2)4-Si(CH3)2-O-Si(CH3)2-(CH2)4-OH
EINECS	227-672-4

Quality Control

Our 1,3-Bis(4-Hydroxybutyl)Tetramethyldisiloxane is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure high purity and consistent performance. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed specifications. We support customized purity grades to meet specific application requirements.

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). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and reactivity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC or HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.430 - 1.440
Density (g/mL at 20°C)	0.92 - 0.96

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