Related Experiment Videos
[Studies for analyzing restricted ingredients such as sodium benzoate]
Hiroshi Tokunaga1, Kenichiro Mori, Tomio Nosaka
1tokunaga@nihs.go.jp
Summary
A new HPLC method accurately quantifies sodium benzoate, a restricted cosmetic preservative in Japan. This validated analytical technique ensures product safety and regulatory compliance for cosmetic formulations.
Area of Science:
- Analytical Chemistry
- Cosmetic Science
Context:
- Sodium benzoate is a common cosmetic preservative.
- It is a restricted ingredient under Japan's Pharmaceutical Affairs Act, necessitating accurate quantification.
- Cosmetic formulations like lotions and creams require reliable analytical methods for ingredient verification.
Purpose:
- To develop and validate a High-Performance Liquid Chromatography (HPLC) method for determining sodium benzoate content in cosmetic products.
- To ensure compliance with regulatory restrictions on sodium benzoate in Japanese cosmetics.
Summary:
- A method was developed using HPLC with an ODS column and a phosphate buffer/acetonitrile mobile phase.
- Samples (lotions/creams) were prepared by dissolving in tetrahydrofuran and methanol.
- The method demonstrated linearity and specificity, with no interference from cosmetic matrices, for concentrations ranging from 0.1% to 1.0% sodium benzoate.
Impact:
- Provides a reliable analytical tool for quality control of cosmetics containing sodium benzoate.
- Supports regulatory agencies in enforcing restrictions on cosmetic ingredients.
- Ensures consumer safety by verifying the accurate levels of preservatives in cosmetic products.