Iron oxide
Synonyms
Iron Oxide
Composition (chemical structure)
CI 77491 (for red iron oxide), CI 77492 (for yellow iron oxide), CI 77499 (for black iron oxide)
pH
Fe2O3
Solubility
Stable in the range of 5-7
Method of acquisition
Not soluble in water, soluble in oil, insoluble in alcohol
Use in cosmetics
Iron oxide occurs naturally as a mineral and can be obtained either through mining or synthetically in laboratories.
Benefits#
Iron oxide is often used as a colorant to color cosmetic products such as lipsticks, eyeshadows, blushes, and makeup. Its high pigmentation and wide range of shades allow cosmetic manufacturers to create a variety of color variations and effects.
Cons
Iron oxide provides long-lasting, intense color, helping cosmetic products adhere better to the skin. It is also stable and resistant to sunlight, meaning the color stays clear and doesn't smudge.
How to work with it
There is a possibility of allergic reactions to iron oxide, especially in people with sensitive skin. It can also be difficult to remove from the skin, especially when used in highly pigmented products.