Acide citrique (anhydre)

Citric acid (anhydrous) is a tricarboxylic acid naturally occurring in citrus fruits, though the cosmetic-grade ingredient is predominantly produced via fermentation of sugars using Aspergillus niger mold. In its anhydrous (water-free) form, it is more concentrated and stable than the monohydrate variant, making it particularly valued for dry or low-water formulations and for precise pH adjustment in a wide range of cosmetic products. Formulators choose it not only for its acidifying efficiency but also for its ability to chelate metal ions that could destabilize formulas, and its mild AHA exfoliant activity that supports skin renewal at higher concentrations.