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An inorganic salt used in cosmetics primarily as a preservative to inhibit microbial growth and as an anti-corrosive agent to protect packaging.
May aggravate
Safety summary
Considered safe for cosmetic use in regulated concentrations. High concentrations can be irritating.
CAS Number
7631-99-4
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.