IRON OXIDES (CI 77491). B
IRON OXIDES (CI 77491). B
IRO
9/10
Concern level
High concern
CI 77491 is the red iron oxide colorant, a mineral pigment used to impart red-to-brown shades in cosmetics. It is an insoluble inorganic particulate pigment with high opacity, good light stability, and broad compatibility in color cosmetics, skincare, and sunscreens.
Pore-clogging
Non-comedogenic
Pregnancy
Safe
Regulatory
No data
Benefits
UV Protection
Chemical Properties
Molecular Weight
159.69 g/molTypical Concentration
0.10% - 20.00%CAS Number: 1309-37-1
Skin Type Compatibility
dry skin8/10
oily skin9/10
sensitive skin9/10
acne prone10/10
mature skin9/10
normal skin10/10
Interactions
incompatible with: No clinically meaningful ingredient incompatibilities are typical in finished cosmetics., May be physically incompatible with poorly dispersed high-electrolyte systems or settling-prone suspensions without proper dispersion/stabilization.
Risks & Warnings
Generally low risk when used as intended. Main concerns are inhalation of fine powders during manufacturing, and possible contamination with trace heavy metals if raw material quality is poor. Rare irritation may occur in very sensitive users.
Vegan Cruelty-Free
