Loading...
Loading...
A strong mineral acid used in cosmetics primarily as a pH adjuster or in the synthesis of other ingredients. It is not typically left as a free ingredient in significant amounts.
May aggravate
Safety summary
Highly corrosive in concentrated forms. Used in very low, controlled concentrations for pH adjustment, or as a processing aid.
CAS Number
7664-93-9
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.