Characters. - A dark tile-red amorphous powder, permanent in dry air, having a faint odour of valerianic acid, and a mildly styptic taste.

Solubility. - Insoluble in cold water, but readily soluble in alcohol.

Reactions. - Boiling water decomposes it, setting free the valerianic acid and leaving ferric hydrate. When slowly heated the salt parts with its acid without fusing, but when rapidly heated it fuses and gives off inflammable vapours having the odour of butyric acid.

Dose. - 1 grain or more.

Uses. - In hysteria with anaemia.