The ether allowed to evaporate will leave the
corrosive sublimate in white silky-looking prisms. Suppose no mercury is
found in the dialyzed fluid, owing to the fact that corrosive sublimate
enters into insoluble compounds with albumin, fibrin, mucous membrane,
gluten, tannic acid, etc., we must dry the insoluble matter, and heat it
with nitro-hydrochloric acid until all organic matter is destroyed and
excess of nitric acid expelled. The residue dissolved in water,
filtered, and tested with copper-foil, etc.
_Tests._--The following table gives the action of corrosive sublimate
with reagents:
1. With iodide of potassium Bright scarlet colour.
2. With potash solution Bright yellow colour.
3. With hydrochloric acid and First a yellowish and then a black
sulphuretted hydrogen colour.
4. Heated in a reduction-tube Melts, boils, is volatilized, and forms
a white crystalline sublimate.
5. With ether Freely soluble; the ethereal solution,
when allowed to evaporate
spontaneously, deposits the salt in
white prismatic crystals.
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