Description

1,1,3,3,5,5,7,7,7-Nonamethyltetrasiloxanol is a specialized organosilicon compound, specifically a silanol-terminated methylsiloxane oligomer. This chemical is valued for its unique combination of silicone backbone flexibility and reactive silanol end groups, making it a versatile intermediate and functional additive. It is primarily sought by formulators and manufacturers in the personal care, coatings, and specialty chemical industries for its ability to modify surface properties and enhance product performance.

Application

• Silicone Resin & Polymer Intermediate: Acts as a key building block or chain extender in the synthesis of custom silicone resins, elastomers, and high-performance polymers.
• Surface Treatment Agent: Used to modify surface energy and improve the wetting, leveling, and adhesion properties of coatings, inks, and adhesives.
• Personal Care & Cosmetic Ingredient: Functions as an emollient, conditioning agent, and texturizer in hair care products, skin creams, and antiperspirants, providing a smooth, non-greasy feel.
• Release & Anti-Stick Coatings: Employed in formulations for mold release agents and anti-adhesive coatings for industrial and food-contact applications.
• Defoamer & Antifoam Component: Serves as an active ingredient in silicone-based defoamers for aqueous and non-aqueous systems across various process industries.
• Coupling Agent & Crosslinker: Utilized to promote compatibility between organic and inorganic phases in composite materials and as a crosslinking agent in sealant formulations.

Basic Information

Product Name	1,1,3,3,5,5,7,7,7-Nonamethyltetrasiloxanol
CAS No.	13176-69-7
Molecular Formula	C9H30O4Si4
Molecular Weight	326.73 g/mol
Synonyms	Nonamethyltetrasiloxan-1-ol; MDHM Silanol; Tetrasiloxane, 1,1,3,3,5,5,7,7,7-nonamethyl-, 1-hydroxy-; Hydroxynonamethyltetrasiloxane; Silanol-terminated polydimethylsiloxane (low MW); Me3SiO[SiMe2O]2SiMe2OH; Dow Corning® Q1-3563 (related trade material); Silanol Fluid
EINECS	Contact for details

Quality Control

Our 1,1,3,3,5,5,7,7,7-Nonamethyltetrasiloxanol is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent purity, composition, and performance. We provide comprehensive Certificates of Analysis (COA) with key parameters including assay, hydroxyl value, viscosity, and moisture content. Our quality commitment supports applications requiring reliable material specifications and traceability.

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 material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC or NMR)	≥ 95.0%
Hydroxyl Value	Contact for details
Viscosity @ 25°C	Contact for details
Water Content (KF)	≤ 0.5%
Specific Gravity @ 25°C	Contact for details

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