
D5 / D6 Cyclo-2345 Cyclomethicone Fluid
Chemical Name: | Polydimethylsiloxane Fluid / PDMS Silicone Oil |
Product Category: | Cyclomethicones – Silicone Fluids |
Structural Formula: | ![]() |
CAS No.: | CAS No. 63148-62-9 |
EINECS: | 203-492-7 |
Molecular Formula: | C6H18OSi2 |
Molecular Weight: | 162.38 g/mol |
D5 / D6 Cyclo-2345 Cyclomethicone Fluid
D5/D6 Cyclo-2345 Cyclomethicone is a volatile polydimethylcyclosiloxane fluid composed of 75% Cyclopentasiloxane (CAS #541-02-6) and 25% Dodecamethylcyclohexasiloxane (CAS# 540-97-6). This fluid is clear, odorless, non-greasy, and non-stinging, making it ideal for various applications in personal care, cosmetics, and industrial sectors.
View product specs:
Chemical name | Cyclopentasiloxane & Cyclohexasiloxane |
CAS No. | CAS #541-02-6, CAS#540-97-630 |
Appearance | Colorless, odorless fluid |
Specific gravity @25°C | 0.960 |
Viscosity at 25 at 25°C | 4.5cSt |
Refractive index | 1.398 |
Surface tension | 20.8 |
Flash point-closed cup | 82°C |
Boiling point @ 760mmHg | 217°C |
Heat of vaporization @25°C (kJ/kg) | 157 |
Properties of Cosmetic-Grade Volatile Carrier Fluid
- Clear, Colorless, and Odorless: Ideal for use in a wide range of cosmetic formulations.
- 100% Evaporates at Room Temperature: Leaves no residue, ensuring a clean finish.
- Low Heat of Vaporization: Non-stinging and safe for skin applications.
- Excellent Lubricity: Provides smooth application before evaporation, enhancing product feel.
- Low Surface Tension: Offers high spreadability for easy application.
- VOC Compliant: Exempt from federal VOC regulations, including CARB and OTC, making it a sustainable alternative to petroleum-based solvents.
- Versatile Compatibility: Easily blends with most polydimethylsiloxane fluids, petroleum-based fluids, anhydrous alcohols, waxes, oils (excluding castor oil), hydrocarbons, esters, and silicone fluids.
- Water Insoluble: Does not mix with water, ensuring its unique characteristics.
Packaging Specifications


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D5 / D6 Cyclo-2345 Cyclomethicone Fluid
Cyclomethicone fluids are commonly used in personal care products due to their smooth feel, low surface tension, and quick evaporation. They work well as base fluids, carrying agents, and wetting agents in items like body sprays, skin creams, hair care products, and more.
A key benefit of Cyclomethicones is that they are exempt from VOC (Volatile Organic Compound) regulations, including California’s strict standards. This makes them an eco-friendly alternative to petroleum-based solvents, as they don’t contribute to ozone depletion or global warming.
Cyclo-2244 and Cyclo-2245 have similar evaporation rates to solvents like mineral spirits, while Cyclo-2345 offers a slower rate for specific needs. Cyclomethicones are also compatible with many materials, including metals and plastics, making them a versatile ingredient for various products.