Characteristic

Iron(III) oxide-hydroxide or ferric oxyhydroxide is the chemical compound of iron, oxygen, and hydrogen with formula FeO(OH).The compound is often encountered as one of its hydrates, FeO(OH)·nH₂O. The monohydrate FeO(OH)·H₂O (CAS 51274-00-1, C.I. 77492) is often referred as iron(III) hydroxide Fe(OH)₃, hydrated iron oxide, yellow iron oxide, or Pigment Yellow 42.

Chemical formula:FeO(OH)

Appearance:Vivid, dark orange, opaque crystals

Odor:odorless

Density:4.25 g/cm³

Solubility in water:insoluble at pH 7

Solubility product (Ksp):2.79×10⁻³⁹ for Fe(OH)₃

Application

Iron(III) hydroxide is used in purifying water and as an absorbent in chemical processes. It is also used as a pigment and as a catalyst. Further, it is used in some tattoo ink and in aquarium water treatment as a phosphate binder.

FeO(OH)-MSDS.pdf