Description

Silanol, Ethenyldimethyl- is a reactive organosilicon monomer featuring a vinyl group and a silanol functional group. This dual functionality makes it a valuable intermediate for introducing cross-linkable sites and enhancing adhesion in silicone polymers and hybrid materials. It is primarily utilized by manufacturers in the silicone elastomer, adhesive, sealant, and specialty coatings industries seeking to modify polymer backbones for improved performance.

Application

• Cross-linking Agent in heat-curable silicone rubber (HVCR) and liquid silicone rubber (LSR) formulations.
• Reactive Intermediate for the synthesis of custom silanes and silicone copolymers.
• Adhesion Promoter in primers and coatings for difficult-to-bond substrates like metals and plastics.
• Surface Modifier for silica and other fillers to improve dispersion and compatibility in polymer matrices.
• Component in moisture-curable sealants and adhesives, contributing to cure speed and final properties.
• Building Block for creating specialized silicone-based release coatings and pressure-sensitive adhesives (PSAs).

Basic Information

Product Name	Silanol, Ethenyldimethyl-
CAS No.	5906-75-2
Molecular Formula	C4H10OSi
Molecular Weight	102.21 g/mol
Synonyms	Dimethylvinylsilanol; Vinyldimethylsilanol; Ethenyldimethylsilanol; Dimethyl(vinyl)silanol; (Dimethylvinylsilyl)oxy; Vinyl(dimethyl)silanol; (Ethenyl)dimethylsilanol; 1,1-Dimethyl-1-silacyclopent-3-en-1-ol (tautomeric form)
EINECS	227-615-6

Quality Control

Our Silanol, Ethenyldimethyl- is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay and impurity profiling by GC and/or HPLC, to ensure it meets precise specifications for reactivity and purity. Certificates of Analysis (COA) detailing all quality parameters are provided with every shipment to guarantee batch-to-batch consistency and 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). This product is hygroscopic (moisture-sensitive) and should be kept under an inert atmosphere (e.g., nitrogen) after opening to prevent condensation and premature reaction.

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 (n20D)	1.410 - 1.420
Density (20°C)	0.85 - 0.90 g/mL

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