At NINGBO INNO PHARMCHEM CO.,LTD., we are dedicated to advancing personal care through high-quality chemical ingredients. Today, we delve into one such essential component: Phenylbenzimidazole Sulfonic Acid, widely recognized by its INCI name and often referred to as Ensulizole (CAS 27503-81-7).

This compound stands out as a powerful UV-B filter, with its peak absorption occurring at 306 nm, effectively shielding the skin from the most damaging solar rays responsible for sunburn and DNA damage. The range of its protection spans from 280 to 340 nm, making it a cornerstone for effective sun protection formulations. While its primary strength lies in UVB absorption, it offers minimal UVA protection. This characteristic makes it an excellent candidate for combination with other UV filters, such as Avobenzone, Titanium Dioxide, or Zinc Oxide, to achieve comprehensive broad-spectrum protection against both UVA and UVB radiation.

One of the most significant advantages of Phenylbenzimidazole Sulfonic Acid is its water-solubility. Unlike many oil-soluble UV filters, this property allows formulators to create sunscreens that are exceptionally lightweight and possess a non-greasy finish. This translates to a more pleasant user experience, particularly for individuals with oily or combination skin types, or those who prefer lighter cosmetic textures. The ability to easily buy this ingredient makes it accessible for creating innovative skincare products.

Furthermore, Phenylbenzimidazole Sulfonic Acid is known for its excellent photostability. This means it remains effective even when exposed to sunlight over time, ensuring sustained protection for the wearer. This stability is not only beneficial for the product's efficacy but can also help protect other, less stable UV filters within the same formulation, thereby enhancing the overall performance and longevity of the sunscreen.

Approved for use in cosmetics worldwide, with concentration limits varying by region (e.g., up to 4% in the US, 8% in Europe), Phenylbenzimidazole Sulfonic Acid is a versatile ingredient. Its use contributes to formulating high SPF products, and it has shown synergistic effects in boosting the SPF when combined with other UV absorbers. Whether used in lotions, gels, or sprays, its inclusion ensures a high-quality product that consumers trust for reliable skin defense. Manufacturers looking to enhance their sun care lines can find this ingredient to be a valuable asset, contributing to formulations that offer both efficacy and cosmetic elegance.

At NINGBO INNO PHARMCHEM CO.,LTD., we supply high-purity Phenylbenzimidazole Sulfonic Acid, supporting the development of superior sunscreen and skincare products. Partner with us to integrate this advanced UV-B filter into your next successful formulation.