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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, salivation, 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.
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