Potassium chloride
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The chemical compound potassium chloride (KCl) is a metal halide composed of potassium and chlorine. In its pure state it is odourless. It has a white to colourless vitreous crystal, with a face-centred cubic structure that cleaves easily in three directions. It is also commonly known as "Muriate of Potash". Potash varies in color from pink or red to white depending on the mining and recovery process used. White potash, sometimes referred to as soluble potash, is usually higher in analysis and is used primarily for making liquid starter fertilizers. more...

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KCl is used in medicine, scientific applications, food processing and in judicial execution through lethal injection. It occurs naturally as the mineral sylvite and in combination with sodium chloride as sylvinite.

Chemical properties

Potassium chloride can react as a source of chloride ion. As with any other soluble ionic chloride, it will precipitate insoluble chlorides when added to a solution of an appropriate metal salt such as silver nitrate:

KCl(aq) + Ag(NO3)(aq) → AgCl(s) + KNO3(aq)

Although potassium is more electropositive than sodium, KCl can be reduced to the metal by reaction with metallic sodium if the potassium is removed by distillation, due to Le Chatelier's principle:

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Blue Cross Blue Shield of Michigan
From Drug Cost Management Report, 7/1/02

* Blue Cross Blue Shield of Michigan (BCBSM) is providing cost comparison information on 25 of the most common brand-name drugs with generic counterparts on its Web site at www.bcbsm.com/generic. The information was developed as a pocket card for physicians, and is now being distributed to members as well. The card is a handy reference for physicians, Blues members, and uninsured patients, because it provides the average wholesale price (AWP), which can be used as a starting point for comparison shopping. BCBSM covers approximately 4.8 million health plan members.

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COPYRIGHT 2003 Gale Group

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