Azelaic Acid (CAS 123-99-9): The Dicarboxylic Acid That Calms Acne, Rosacea, and Stubborn Marks
A practical supplier guide to Azelaic acid (CAS 123-99-9): what the dicarboxylic acid is, how its comedolytic, antimicrobial, anti-inflammatory, and tyrosinase-inhibiting actions clear acne, calm rosacea, and fade marks, typical up-to-10% use levels, smart pairings with salicylic acid, kojic acid, alpha-arbutin, vitamin C, GHK-Cu, squalane, mild surfactants, citric acid and Argireline, plus safety notes and buyer COA guidance.
