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An inorganic acid primarily used as a pH adjuster in cosmetic formulations to achieve the desired acidity or alkalinity, and can also act as a chelating agent.
May aggravate
Safety summary
Safe for topical use in low concentrations as a pH adjuster. High concentrations can be irritating.
CAS Number
7664-38-2
1% line marker
This ingredient is commonly used as a marker to identify where ingredients drop below 1% concentration on the label.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.