INCI Name Cyclopentasiloxane (D5)
CAS Number 541-02-6
Cyclopentasiloxane is a widely used ingredient in cosmetics, known for its lightweight, non-greasy nature. Its chemical formula, C10H30O5Si5, classifies it as a colorless, odorless, and water-thin silicone. Instead of being absorbed, it evaporates quickly from the skin, making it ideal for fast-drying products such as antiperspirants and hair sprays.
Purpose
Cyclopentasiloxane serves as an effective emollient, helping to soften and smooth the skin and hair by forming a lightweight, protective barrier. Its hair conditioning properties enhance manageability, reduce frizz, and add a silky texture without weighing hair down. In skin conditioning, it creates a velvety feel, improving spreadability in formulations while ensuring a non-greasy, fast-drying finish.
Origin
Cyclopentasiloxane is a synthetic compound composed of silicone and oxygen, with occasional inclusion of elements like hydrogen and carbon. Although these elements occur naturally, Cyclopentasiloxane undergoes chemical processing before being incorporated into cosmetic and skincare formulations.
| Feature | Description |
| Name | Cyclopentasiloxane (D5) |
| Type | Volatile silicone |
| Source | Synthetic, derived from silica |
| Odor | Odorless or very mild |
| Color | Clear, colorless |
| Physical state | Liquid |
| Boiling Point | 210°C |
| Concentration | 1%–15% |
| Solubility | Insoluble in water, soluble in silicones and oils |
| PH | Neutral |
Lightweight & Fast-Evaporating Formula
Cyclopentasiloxane is a volatile silicone that evaporates quickly from the skin and hair, ensuring a dry, non-sticky finish. This makes it a key ingredient in fast-drying formulations like antiperspirants, setting sprays, and hair serums.
Silky, Non-Greasy, and Luxurious Texture
Provides a smooth, velvety feel without any greasiness, enhancing the sensory experience of skincare, haircare, and makeup products while improving their overall application.
Superior Spreadability for Even Application
Acts as an excellent carrier, ensuring even distribution of active ingredients in formulations, improving absorption while preventing product buildup.
Breathable Barrier for Moisture Retention
Forms a lightweight, breathable film on the skin and hair, helping to lock in moisture without clogging pores or leaving a heavy residue.
Frizz Control & Hair Detangling for Smooth Manageability
Reduces friction between hair strands, making detangling easier while controlling frizz, enhancing shine, and improving hair manageability without weighing it down.
Water-Resistant Properties for Long-Lasting Effects
Enhances the longevity of waterproof and sweat-resistant formulations in makeup, sunscreens, and haircare products, improving durability and wear time.
Non-Comedogenic & Suitable for All Skin Types
Unlike heavier silicones, Cyclopentasiloxane does not clog pores, making it safe for oily and acne-prone skin while still providing hydration and smoothness.
Stabilizes Formulations & Enhances Product Performance
Compatible with a wide range of cosmetic ingredients, helping to stabilize emulsions, prevent formula separation, and improve overall product performance.
Applications of Cyclopentasiloxane
Hair Care Products
- Shampoos & Conditioners: Enhances softness, smoothness, and detangling while reducing frizz.
- Hair Serums & Leave-In Treatments: Provides a lightweight, silky feel without weighing hair down.
- Hair Sprays & Styling Products: Improves spreadability and ensures even application while delivering a non-greasy finish.
- Heat Protectants: Forms a protective barrier against heat damage from styling tools.
Skincare & Cosmetic Products
- Moisturizers & Lotions: Enhances spreadability, provides a smooth texture, and locks in moisture without heaviness.
- Serums & Primers: Creates a silky base, fills in fine lines, and helps makeup apply more evenly.
- Sunscreens: Improves water resistance, making sun protection more effective and long-lasting.
- Foundations & BB Creams: Provides a lightweight, non-cakey finish while improving blendability.
- Lipsticks & Lip Balms: Contributes to a smooth, non-sticky texture and enhances wear time.
Body Care Products
- Antiperspirants & Deodorants: Ensures a fast-drying, non-tacky feel while helping active ingredients spread evenly.
- Body Oils & Dry Touch Sprays: Provides a luxurious feel without leaving a greasy residue on the skin.
Medical & Pharmaceutical Uses
- Wound Healing Creams: Used in formulations that require a breathable, protective barrier.
- Scar & Stretch Mark Treatments: Helps improve skin texture and enhances the effectiveness of active ingredients.
Makeup & Cosmetic Formulations
Concealers & Highlighters: Enhances smooth application and prevents caking or settling into fine lines.
Setting Sprays & Finishing Mists: Improves product longevity by creating a breathable, lightweight film.
