_Sal Enixum_ of Commerce.
QUALITIES. _Crystals_, long hexangular prisms; _Taste_, sour and
slightly bitter. CHEMICAL COMPOSITION. It is a bi-sulphate, consisting
of two proportionals of acid, and one proportional of base. SOLUBILITY.
It is soluble in twice its weight of water, as well as in alcohol. MED.
USES. It affords a convenient mode of exhibiting sulphuric acid combined
with a saline purgative, in a solid form; as it is more soluble, so is
it more active than the sulphate. DOSE, grs. x to ʒij. It forms a
grateful adjunct to rhubarb. See _Form. 85._