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Iodine--iodide Of Potassium

=Iodine= occurs in scales of a dark bluish-black colour. It strikes blue

with solution of starch, and stains the skin and intestines

yellowish-brown. Liquid preparations, as the liniment or tincture, may

be taken accidentally or suicidally.

Symptoms.--Acrid taste, tightness of throat, epigastric pain, and then

symptoms of irritant poisons generally. Chronic poisoning (iodism) is

characterized by coryza, s
livation, and lachrymation, frontal headache,

loss of appetite, marked mental depression, acne of the face and chest,

and a petechial eruption on the limbs.

Post-Mortem Appearances.--Those of irritant poisoning with corrosion,

and staining of a dark brown or yellow colour.

Treatment.--Stomach-pump and emetics, carbonate of sodium, amylaceous

fluids, gruel, arrowroot, starch, etc.

Analysis of Organic Mixture containing Iodine.--Add bisulphide of

carbon, and shake. The iodine may be obtained on evaporation as a

sublimate. It will be recognized by the blue colour which it gives with


=Iodide of Potassium.=--Colourless, generally opaque, cubic crystals,

soluble in less than their weight of cold water.

Symptoms.--Not an active poison, but even small doses sometimes

produce the effects of a common cold, including those symptoms already

mentioned as occurring with iodine.

Analysis.--Iodide of potassium in solution gives a bright yellow

precipitate with lead salts; a bright scarlet with corrosive sublimate;

and a blue colour with sulphuric or nitric acid and starch.