DERIVATION.--Iron wire is dissolved by boiling in dilute sulphuric acid.
PROPERTIES.--Large, pale bluish-green, monoclinic prisms, without odor
and having a saline styptic taste; efflorescent in dry air. On exposure
to moist air the crystals rapidly absorb oxygen and become coated with
brownish-yellow, basic ferric sulphate; soluble in water, insoluble in
alcohol.
DOSE.--Same as reduced iron.