Characters and Tests. - A white amorphous powder, deliquescent, and soluble in water without leaving any residue.

Reactions. - Heated to redness it blackens, evolving inflammable gases; and leaving a residue of lithium carbonate which gives the usual reactions.

Dose. - 5-10 grains.

Use. - It has a similar action to the carbonate, and may be used in its stead where we wish to avoid any local action upon the stomach itself.