Recommended Usage for Sunscreen Ingredients

Based on the product information, here are the recommended usage ranges for the ingredients you asked about in a sunscreen formulation targeting SPF50, PA+++:

• Methylene Bis-Benzotriazolyl Tetramethylbutylphenol (Bisoctrizole, e.q. Tinosorb M): The recommended usage rate is 1-10%. This ingredient provides broad-spectrum protection against UVB, UVA I, and UVA II.
• Zinc Oxide 200nm EasyDisperse™: The recommended usage rate is 5-25%. This is a physical sunscreen that effectively protects against long-wave UVA. Using a coated version like EasyDisperse™ helps with dispersion and reduces the whitening effect.

To achieve SPF50, PA+++, you will typically need to use a combination of UV filters. The exact percentage within the recommended range for each ingredient will depend on the specific formulation and the target SPF/PA values. It is often beneficial to combine Zinc Oxide with Titanium Dioxide for comprehensive UVA/UVB protection across all wavelengths.