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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Upsher-Smith launched K-Dur generic - Brief Article
From Drug Store News, 9/24/01

Upsher-Smith launched Kior-Con (potassium chloride extended-release tablets) in M10 and M20 strengths earlier this month. They are the first bio-equivalent alternatives to Key Pharmaceutical's K-Dur potassium products in the same strengths. Upsher-Smith, which already markets 8 strength and 10 strength Klor-Con tablets and oral solutions, expects to claim a 50 percent unit share of K-Dur's business by year's end with the addition of the M10 and M20 tablets. "Of the $350 million potassium chloride market, K-Dur represents about $260 million," Upsher-Smith vice president Philip Dristsas said. Potassium drugs are used to help prevent and treat hypokalemia, a complication of hypertension.

COPYRIGHT 2001 Reproduced with permission of the copyright holder. Further reproduction or distribution is prohibited without permission.
COPYRIGHT 2001 Gale Group

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