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An instant cold pack is a single-use device that consists of two bags; one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it dissolves the solid in an endothermic process. This process absorbs heat from the surroundings, quickly ...
Ammonium nitrate is used in some instant cold packs, as its dissolution in water is highly endothermic. In 2021, King Abdullah University of Science and Technology in Saudi Arabia conducted experiments to study the potential for dissolving ammonium nitrate in water for off-grid cooling systems and as a refrigerant. They suggested that the water ...
Calcium ammonium nitrate is used in some instant cold packs as an alternative to ammonium nitrate. Calcium ammonium nitrate has seen use in improvised explosives. The CAN is not used directly, but is instead first converted to ammonium nitrate; "More than 85% of the IEDs used against U.S. forces in Afghanistan contain homemade explosives, and ...
Ammonium chloride-5 0.3 to 1 ratio of salt to ice. Liquid N 2: Aniline-6 Ice: Sodium thiosulfate pentahydrate-8 1.1 to 1 ratio of salt to ice. Ice: Calcium chloride hexahydrate-10 1 to 2.5 ratio of salt to ice. Liquid N 2: Ethylene glycol-10 Ice: Acetone-10 1 to 1 ratio of acetone to ice. Liquid N 2: Cycloheptane-12 Dry ice: Benzyl alcohol-15 ...
Self-heating rice with quicklime and water as heating source, taken before adding water to quicklime. The source of the heat for the self-heated can is an exothermic reaction that the user initiates by pressing on the bottom of the can.
I think this is just stating the obvious use of ammonium nitrate in the production of explosives, etc. I think we don't need to include this information, since it is a general usage of the ingredients and not really a notable illicit usage of the packs themselves: Anyone could easily do the same for something else containing the same ingredients.--60.38.218.219 06:18, 25 August 2009 (UTC) []
A reusable package or container is "designed for reuse without impairment of its protective function." [ 1 ] The term returnable is sometimes used interchangeably but it can also include returning packages or components for other than reuse: recycling , disposal, incineration, etc. Typically, the materials used to make returnable packaging ...
Potassium nitrate can be made by combining ammonium nitrate and potassium hydroxide. NH 4 NO 3 + KOH → NH 3 + KNO 3 + H 2 O. An alternative way of producing potassium nitrate without a by-product of ammonia is to combine ammonium nitrate, found in instant ice packs, [30] and potassium chloride, easily obtained as a sodium-free salt substitute.
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