Ferric bromide

Ferric Bromide (Iron(III) bromide), with the chemical formula FeBr3, is a dark red to brownish-yellow solid commonly used as a Lewis acid catalyst in the bromination of aromatic compounds. It has an octahedral structure with six-coordinate iron centers and forms polymeric chains in the solid-state.

Key Properties:

Chemical formula: FeBr3

Appearance: Dark red to brownish-yellow powder or crystals

Molecular weight: 295.56 g/mol

Melting point: About 200°C (decomposes above this)

Solubility: Soluble in water, ether, and alcohols forming acidic solutions

Stability: Hygroscopic and sensitive to moisture; decomposes above 200°C to FeBr2 and bromine

Uses: Catalysis in organic synthesis, especially for aromatic bromination, and synthesis of bromine compounds

Safety: Corrosive, causing skin, eye, and respiratory irritation; handle with proper PPE and storage under inert atmosphere

Ferric bromide is prepared by direct reaction of iron with bromine or by oxidation of ferrous bromide with bromine. It is less stable than ferric chloride and tends to decompose with heat or moisture exposure.

This description is suitable for chemical catalogs, laboratory reagent suppliers, and industrial users requiring detailed technical and safety information.