Green Vitriol.

Properties : Ferrous sulphate occurs as large, pale bluish-green crystals, without odor, having a saline, styptic taste and efflorescent in dry air. It is freely soluble in water (1:0.9), but practically insoluble in alcohol.

Action and Uses : Ferrous sulphate is seldom administered in medicine as such, but is used chiefly for pharmaceutical purposes, in the making of ferrous carbonate. The sulphate was formerly used extensively as a disinfectant and deodorant but is now seldom so employed.

Dosage: 0.2 gm. or 3 grains.