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A strong inorganic acid, primarily used as a chemical reagent or for pH adjustment in highly diluted forms, not typically a direct cosmetic ingredient.
May aggravate
Safety summary
While concentrated hydrochloric acid is corrosive, it is used in extremely dilute forms in cosmetics solely for pH adjustment. At these low concentrations, it is generally safe, but improper formulation could lead to irritation.
CAS Number
7647-01-0
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.