Description

Tetradecamethylcycloheptasiloxane is a high-purity, volatile cyclic siloxane, also known as D7. This compound serves as a versatile intermediate and functional fluid, prized for its excellent thermal stability, low surface tension, and high compressibility. It is essential for manufacturers in the personal care, electronics, and specialty polymer industries seeking reliable performance in formulations and production processes.

Application

• Personal Care & Cosmetics: Acts as a volatile carrier, emollient, and solvent in antiperspirants, deodorants, skin care products, and hair conditioners, providing a smooth, non-greasy feel.
• Silicone Polymer Production: Serves as a key monomer or intermediate in the synthesis of high molecular weight polydimethylsiloxanes (PDMS) and other silicone copolymers.
• Electronics & Semiconductor: Used as a heat transfer fluid or a component in specialty cleaning agents and release coatings for sensitive electronic components.
• Lubricants & Greases: Functions as a base fluid or additive in high-performance lubricants and greases requiring thermal and oxidative stability.
• Defoamers & Antifoams: An effective ingredient in silicone-based defoamer formulations for industrial processes, including pulp/paper and wastewater treatment.
• Mold Release Agents: Provides excellent release properties in plastic, rubber, and composite molding applications.
• Water Repellents: Used in formulations for textiles, leather, and construction materials to impart water-resistant characteristics.
• Research & Development: Employed as a standard or reagent in analytical chemistry and material science research.

Basic Information

Product Name	Tetradecamethylcycloheptasiloxane
CAS No.	107-50-6
Molecular Formula	C14H42O7Si7
Molecular Weight	518.99 g/mol
Synonyms	Cycloheptasiloxane, tetradecamethyl-; D7; Octamethylcyclotetrasiloxane, dimer; Decamethylcyclopentasiloxane, homolog; Cyclic Volatile Methyl Siloxane (cVMS) D7; Heptamer; 2,2,4,4,6,6,8,8,10,10,12,12,14,14-Tetradecamethyl-1,3,5,7,9,11,13-heptaoxa-2,4,6,8,10,12,14-heptasilacyclotetradecane
EINECS	203-494-7

Quality Control

Our Tetradecamethylcycloheptasiloxane is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including gas chromatography (GC), to ensure high purity and consistency. Certificates of Analysis (COA) detailing specific batch results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its volatile nature, ensure containers are properly sealed when not in use.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Refractive Index (n20D)	1.395 - 1.398
Density (20°C)	0.955 - 0.965 g/mL
Water Content (KF)	≤ 0.05%

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