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Potassium chloride

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Description
Application
Properties

Other names

  • Sylvite
  • Muriate of potash
  • Potassium chloride

Product description

Potassium chloride is a metal halide salt composed of potassium and chlorine. It is odorless and has a white or colorless vitreous crystal appearance. The solid dissolves readily in water and its solutions have a salt-like taste. KCl is used as a fertilizer, in medicine, in scientific applications, and in food processing.

Potassium chloride is a common, naturally occurring mineral. According to the Food & Drug Administration, generally recognized as safe (GRAS)affirmed uses of potassium chloride in foods are as: a flavor enhancer, flavoring agent, nutrient supplement, pH control agent, and stabilizer or thickener.1 However, potassium chloride is generally used for two main purposes in food products. The first is to provide potassium enrichment to foods. The second is as a salt replacer to reduce the sodium content in foods. Like salt (aka sodium chloride), potassium chloride provides a salty flavor and can also often play other functional roles (e.g. microbial management, protein modification, flavor enhancement) that impacts the taste, texture, and shelf life of food products.

Potassium chloride is widely used as a salt replacer or to provide potassium enrichment in many different food products including:

  • Baby formulas
  • Cereals
  • Frozen entrees
  • Meats
  • Snack foods, such as chips or crisps
  • Sports/electrolyte drinks
  • Soups
  • Sauces
  • Snack/meal bars

Origin

  • Russia
  • China

Packing

25 or 40 kg

Fertilizer

The majority of the potassium chloride produced is used for making fertilizer, called potash, since the growth of many plants is limited by potassium availability. The two main types of potash are: Muriate of Potash (MOP, Potassium Chloride) and Sulphate of Potash (SOP, Potassium Sulphate). While SOP typically sells at a premium to MOP, the vast majority of potash fertilizer worldwide is sold as MOP.

Medical use

This medication is a mineral supplement used to treat or prevent low amounts of potassium in the blood. A normal level of potassium in the blood is important. Potassium helps your cells, kidneys, heart, muscles, and nerves work properly. Most people get enough potassium by eating a well-balanced diet. Some conditions that can lower your body's potassium level include severe prolonged diarrhea and vomiting, hormone problems such as hyperaldosteronism, or treatment with "water pills"/diuretics.

Industrial

  • As a chemical feedstock, it is used for the manufacture of potassium hydroxide and potassium metal. It is also used in medicine, lethal injections, scientific applications, food processing, soaps, and as a sodium-free substitute for table salt for people concerned about the health effects of sodium.
  • It is used as a supplement in animal feed to boost the amount of nutrients in the feed, which in turn promotes healthy growth in animals. As an added benefit, it is known to increase milk production.
  • It is sometimes used in water as a completion fluid in petroleum and natural gas operations, as well as being an alternative to sodium chloride in household water softener units.
  • Glass manufactures use granular potash as a flux, lowering the temperature at which a mixture melts. Because potash confers excellent clarity to glass, it is commonly used in eyeglasses, glassware, televisions and computer monitors.
  • Potassium chloride is used in some de-icing products that are designed to be safer for pets and plants, though these are inferior in melting quality to calcium chloride [lowest usable temperature 12 °F (−11 °C) v. −25 °F (−32 °C)]. It is also used in various brands of bottled water, as well as in bulk quantities for fossil fuel drilling purposes.
  • Potassium chloride was once used as a fire extinguishing agent, used in portable and wheeled fire extinguishers.
  • Along with sodium chloride and lithium chloride, potassium chloride is used as a flux for the gas welding of aluminium.
  • Potassium chloride is also an optical crystal with a wide transmission range from 210 nm to 20 µm. While cheap, KCl crystal is hygroscopic.
  • Potassium chloride has also been used to produce heat packs which employ exothermic chemical reactions, but these have mostly been discontinued with the advent of cheaper and more efficient methods, such as the oxidation of metals ('Hot Hands' one-time-use products) or the crystallization of sodium acetate (multiple-use products).
Odor odorless
Solubility Soluble in glycerol, alkalies
Slightly soluble in alcohol

Insoluble in ether

Assay (as KCl) after drying, not less than: 99.0%

 

Loss ≤0.5% loss on drying, 105 °C, 3 h

 

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