Yellow Oxide #2 - Sienna

Yellow oxide is also known as Iron (III) oxide-hydroxide (Fe(OH)3) and occurs naturally in the mineral goethite. 

It comes in 4 different shades and they do affect your finished product, and to make life more confusing, they all have the same CI 77492 number. 

This is Sienna yellow oxide, a soft tan colour that makes a lovely base for warm skin tones for foundations and eyeshadows.  You can also use it as a base tone for lipstick.

Iron Oxides are generally naturally occurring non-toxic inorganic mineral pigments sourced from iron and are considered safe for use in colouring products, including cosmetics and personal care products applied to the face, lips, and the area of the eye, provided they meet certain specifications.  

Iron Oxides are a colour additive exempt from FDA certification.