Description

1,1,3,3-Tetramethyldisiloxane-1,3-Diol is a versatile organosilicon intermediate, specifically a silanol-functional disiloxane, valued for its unique bifunctional reactivity. This compound serves as a critical building block in the synthesis of complex silicone polymers and as a surface-modifying agent. It is essential for manufacturers in the silicone elastomer, resin, and specialty chemical industries seeking to introduce specific functional groups or cross-linking points into their products.

Application

• Silicone Polymer Synthesis: A key monomer or chain extender for producing modified polysiloxanes, siloxane copolymers, and silicone resins with tailored properties.
• Cross-linking Agent: Used in room-temperature vulcanizing (RTV) silicone formulations and as a cross-linker in silicone sealants and adhesives.
• Surface Treatment: Acts as a coupling agent or surface modifier for inorganic materials like silica, glass, and metals to improve compatibility with organic matrices.
• Pharmaceutical & Cosmetic Intermediates: Employed in the synthesis of siloxane-based excipients, delivery systems, and conditioning agents.
• Specialty Additives: Used to manufacture silicone surfactants, defoamers, and flow control additives for coatings and industrial processes.
• Research & Development: Serves as a valuable reagent in organic and organometallic chemistry research for constructing novel silicon-containing architectures.

Basic Information

Product Name	1,1,3,3-Tetramethyldisiloxane-1,3-Diol
CAS No.	1118-15-6
Molecular Formula	C4H14O3Si2
Molecular Weight	166.32 g/mol
Synonyms	1,3-Dihydroxy-1,1,3,3-tetramethyldisiloxane; Tetramethyldisiloxane-1,3-diol; Bis(hydroxydimethylsilyl) ether; Dihydroxytetramethyldisiloxane; 1,1,3,3-Tetramethyl-1,3-disiloxanediol; TMDS diol; Hydroxydimethylsiloxane dimer
EINECS	214-263-3

Quality Control

Our 1,1,3,3-Tetramethyldisiloxane-1,3-Diol is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent purity and performance. Certificates of Analysis (COA) detailing key specifications such as assay, identity, and impurity profiles are provided to guarantee compliance with 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). This material is moisture-sensitive (hygroscopic); keep the container tightly sealed to prevent absorption of atmospheric moisture, which may affect product stability and performance.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (20°C)	1.390 - 1.400
Density (20°C)	0.95 - 1.00 g/mL

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