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Specifications
| Appearance: | Colorless to light yellowish liquid |
| Identity (IR, USP): | 0.95 min |
| Refractive index, nD 20: | 1.440 - 1.445 |
| UV specific extinction: | 160 - 190 |
| Viscosity (25℃): | 600 - 1000 mPa·s |
| Heavy metals: | 10 ppm max |
| Methanol: | 50 ppm max |
| Isopropanol: | 50 ppm max |
| Octamethylcyclotetrasiloxane: | 0.1% max |
| Decamethylcyclopentasiloxane: | 0.1% max |
Applications
Polysilicone-15 is an advanced organosilicon-based UVB absorber widely utilized in the cosmetic, personal care, and sunscreen industries. It functions as a high-performance UV filter that protects skin and hair from harmful ultraviolet radiation, particularly in the 290–320 nm wavelength range. Owing to its excellent compatibility with a wide range of cosmetic ingredients, it is frequently used in formulations such as sunscreens, day creams, BB creams, foundations, and color cosmetics to provide consistent and long-lasting UV protection. In hair care products like shampoos, conditioners, and leave-in treatments, Polysilicone-15 helps shield hair fibers and dyes from UV-induced fading and structural damage. Its silicone backbone imparts smoothness, flexibility, and film-forming properties, making it an ideal choice for water-resistant and photostable sun protection formulations. Beyond personal care, it is also applied in coatings and plastics where UV stabilization is required to prevent degradation, yellowing, and brittleness of polymer surfaces exposed to sunlight.
Benefits
The benefits of Polysilicone-15 arise from its superior photostability, mildness, and multifunctional performance in formulations. Unlike many organic UV filters that degrade under sunlight, Polysilicone-15 maintains stability and efficiency even after prolonged UV exposure, providing extended protection. Its silicone-based molecular structure allows for excellent film formation on skin and hair, resulting in even coverage and resistance to water, sweat, and rubbing. This enhances product durability and user comfort, particularly in outdoor and sports sunscreens. It also contributes to a smooth, non-greasy, and silky sensory profile, improving overall formulation aesthetics. Polysilicone-15 is compatible with both oil- and water-phase ingredients and can be used synergistically with other UV filters to boost broad-spectrum protection and optimize SPF performance. Furthermore, it is non-irritating, non-sensitizing, and suitable for sensitive skin applications, aligning with modern consumer demands for safety and cosmetic elegance. Its chemical stability and versatility also help formulators reduce the need for additional stabilizers or antioxidants, simplifying product design.
Conclusion
Polysilicone-15 (CAS 207574-74-1) is a next-generation UVB filter that delivers exceptional sun protection, formulation stability, and sensory benefits across a wide range of cosmetic and personal care products. Its unique combination of silicone-based flexibility, water resistance, and photostability makes it indispensable for modern sunscreen and skin care formulations. By protecting skin, hair, and materials from UV-induced damage while enhancing texture and durability, Polysilicone-15 contributes to both product performance and consumer satisfaction. It remains a key ingredient for formulators seeking reliable, high-quality, and elegant UV protection solutions in the global personal care industry.
