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INCI: FERROUS SULFATE
An iron salt used as an astringent and skin conditioning agent in cosmetic formulations.
Beneficial for
Safety summary
Can be irritating in high concentrations. Used with caution in cosmetics.
CAS Number
7720-78-7
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.