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CI 77492

Last update on Jul 3, 2025

CI 77492 is a dye of mineral origin also called Iron Oxide. It gives products their yellow color. It is often mixed with other iron oxides like CI 77491 (red) and CI 77499 (black) to represent different hues. It is authorized in organic. α-Fe2O3·H2O.

CAS Number: 51274-00-1 / 64294-91-3Chem/IUPAC Name: Iron oxideEINECS/ELINCS No: 257-098-5 / 215-722-3 / 215-570-8 / 257-670-1COSING REF No: 32830

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What is CI 77492 used for?

It is widely used in color cosmetics to give a color to the skin and impart color to the personal care products. It is added in products such as concealer, foundation, eye shadow, eyebrow powder, BB cream, CC cream, and soap. It is often mixed with other iron oxides such as CI 77491 (red) and CI 77499 (black) to represent different shades.

Origin

Thermal decomposition of iron salts, precipitation of iron salts, and reduction of organic compounds by iron.

What does CI 77492 do in a formulation?

COSMETIC COLORANT

Safety Profile

This compound has a long history of use as a colorant in cosmetics and is considered safe for use by the FDA.

CI 77492 alternatives

CI 77492 technical profile

PropertyValues
Melting Point135°C
pH3.4 - 3.9
SolubilitySoluble in mineral acids
Insoluble in water and ethanol