Preservative NB consists of a combination of Benzoic Acid and Sorbic Acid in Benzyl Alcohol. It does not contain parabens, formaldehyde or formaldehyde-releasing substances and is classed as "Natural" under the German BDIH recommendation for Natural Cosmetic Products and is compliant with EU Cosmetics Directives. Preservative NB can be processed at temperatures of up to 80 Degrees Celsius. Suitable for use in Creams & Lotions, Shampoos and Bath Products, Gels and Foam Baths.
If you intend to make this "natural" claim in Australia please check with the TGA for guidance. We are not able to offer advice on this subject.
Your cosmetic product pH needs to be 4 – 5.5 for this preservative to be effective. You can adjust the pH of shampoo and moisturises with Citric Acid.
Usage Rates:
For Rinse off and cosmetic products: 0.3% - 1.0%
For simple Surfactant Formulas: Dosages of 0.2% are usually sufficient
To determine the optimal usage rate for your individual product, we recommend a preservation challenge test be carried out.
