Iron Oxides[1][2] ●
TL;DR. This ingredient is an inorganic colorant used to create red, yellow, brown, and black shades in makeup, tinted sunscreen, and skin-care products. It also helps adjust opacity, coverage, and undertone.
What does Iron Oxides[1][2] do in a cosmetic formula?
This ingredient is an inorganic colorant used to create red, yellow, brown, and black shades in makeup, tinted sunscreen, and skin-care products. It also helps adjust opacity, coverage, and undertone.
Is Iron Oxides[1][2] clean?
It is generally well tolerated, non-sensitizing, and widely accepted in clean-beauty standards when cosmetic-grade purity limits for heavy metals are met. The main scrutiny is impurity control, not routine skin irritation.
Is Iron Oxides[1][2] sustainable?
This material is mineral-based or nature-identical through controlled manufacture, and cosmetic grades are insoluble and environmentally inert rather than biodegradable. Sustainability considerations center on mining footprint, processing energy, and trace-metal purification.
Is Iron Oxides[1][2] COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic as an approved mineral colorant when it meets purity specifications. From a Green Chemistry lens, it scores well for stability and low reactivity, while renewable feedstock and biodegradation are not applicable strengths for an inorganic pigment.
How does Iron Oxides[1][2] work chemically?
This material is an insoluble inorganic pigment made from metal-and-oxygen crystal lattices, with particle size and crystal form determining red, yellow, brown, or black color. Use levels range from trace amounts for tint adjustment to about 1–15% in color cosmetics, and it remains stable across typical cosmetic pH, heat, and light when properly dispersed.
Last updated 2026-05-13