- CAS number:
- Phenylbenzimidazole sulfonic acid
- EINECS number:
- Organic UV filters
AakoSun PBSA is a water soluble UVB filter and the solubility could be further improved by adding a base to your formulation i.e. NaOH, TEA due to the forming of soluble salts. By combining the AakoSun PBSA with oil soluble UV filters i.e. AakoSun AVB, AakoSun OCR it provides a good synergy and a SPF increase could be achieved.
It has the characteristic of feeling lighter on the skin because it’s a water-soluble product. In formulations the pH-value need to be buffered around 7.0, at lower levels precipitation could be a result of reverting to its acid form.