ISO 21109:2025 PDF

Overview

ISO 21109:2025 is an international standard developed by the International Organization for Standardization (ISO) that specifies a precise test method for determining the pH of nicotine pouches. Nicotine pouches are oral products containing nicotine, vegetable fiber bases, and flavorings but no tobacco leaf material. Accurate pH measurement is critical for understanding the proportion of non-protonated (free-base) nicotine available, which influences product behavior and user experience. This standard reflects an outcome of an extensive international interlaboratory study coordinated by CORESTA’s Tobacco and Tobacco Products Analytes Sub-Group in 2021, ensuring reliable reproducibility and repeatability across testing facilities worldwide.