Silicone Gel and Crosspolymer

The term "Silicone Gel" is often used as a product name for formulations that contain a blend of silicones, commonly including Cyclopentasiloxane and a Dimethicone Crosspolymer. For example, products like Silicone Gel (Thick & Smooth, Cyclopentasiloxane Base) and Silicone Gel 9040 (e.q. DC 9040, Cyclopentasiloxane Base) have the INCI name Cyclopentasiloxane (and) Dimethicone Crosspolymer. Another product, Silicone Gel (Ultra Clear, Super Silky), contains Cyclopentasiloxane (and) Dimethicone/Vinyl Dimethicone Crosspolymer. So, while not strictly the same chemical name, the "Silicone Gel" products you encountered likely refer to formulations based on Cyclopentasiloxane and a Dimethicone Crosspolymer.

SPF Calculation

Calculating the exact SPF (Sun Protection Factor) of a sunscreen formulation is complex and cannot be determined simply by adding the percentages of the UV filters. The final SPF value depends on several factors, including:

• The specific types and grades of UV filters used (e.g., particle size and coating for Titanium Dioxide and Zinc Oxide).
• How well the UV filters are dispersed in the formulation.
• Interactions between different ingredients in the formula.
• The overall formulation base.
• In-vitro or in-vivo testing.

The combination of OMC (Octyl Methoxycinnamate), Titanium Dioxide Nano, and Zinc Oxide Micronized provides broad-spectrum UV protection. OMC primarily protects against UVB rays, while Titanium Dioxide and Zinc Oxide provide protection against both UVA and UVB rays.

To accurately determine if your specific formulation with OMC 4%, Titanium Dioxide Nano 4%, and Zinc Oxide Micronized 7.64% achieves SPF 50, you would need to use specialized SPF calculation software (like the BASF simulator mentioned in the description for OMC) or perform laboratory testing. Based solely on the percentages, it is not possible to confirm an SPF of 50.