Description

1,3-Diacetoxytetramethyldisiloxane is a versatile organosilicon compound characterized by its reactive acetoxy groups. This chemical serves as a valuable intermediate and functional modifier in advanced material synthesis, offering controlled reactivity and compatibility with various substrates. It is primarily utilized by manufacturers in the silicone polymer, pharmaceutical, and specialty chemical industries for applications requiring precise surface modification or cross-linking.

Application

• Silicone Polymer Modification: Acts as a chain extender or cross-linking agent in the synthesis of specialty silicone oils, resins, and elastomers.
• Surface Treatment Agent: Used to impart hydrophobic or release properties to surfaces of glass, minerals, and fillers.
• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of active pharmaceutical ingredients (APIs) and silicon-based drug delivery systems.
• Adhesive & Sealant Formulations: Functions as an adhesion promoter and moisture-cure component in high-performance silicone sealants and adhesives.
• Coating Additive: Incorporated into coatings to enhance weather resistance, water repellency, and surface slip.
• Laboratory Reagent: Employed in organic and organometallic synthesis as a silylating or protecting agent.

Basic Information

Product Name	1,3-Diacetoxytetramethyldisiloxane
CAS No.	5314-58-9
Molecular Formula	C8H18O5Si2
Molecular Weight	250.40 g/mol
Synonyms	Bis(acetoxy)tetramethyldisiloxane; Tetramethyl-1,3-diacetoxydisiloxane; 1,3-Diacetoxy-1,1,3,3-tetramethyldisiloxane; Acetoxy-terminated polydimethylsiloxane (short chain); Disiloxane, 1,1,3,3-tetramethyl-1,3-diacetoxy-; HMDS diacetate (common name); Hexamethyldisiloxane diacetate
EINECS	226-155-8

Quality Control

Our 1,3-Diacetoxytetramethyldisiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay by GC or HPLC and impurity profiling, to ensure high purity and consistent performance. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and specific test results is provided with every shipment to guarantee compliance with your technical 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); containers must be kept tightly sealed to prevent contact with atmospheric moisture, which can lead to hydrolysis and degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Acidity (as Acetic Acid)	≤ 1.0%

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