What is the liquid in an instant cold pack?

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I am not sure what it is called or how it works, but it is, as far as I know, not safe to eat. And if it gets on your skin wash very well. Hope this helps some.

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I think it's ammonium nitrate, but I'm not entirely sure.

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It is ammonium nitrate. They come with dry ammonium nitrate crystals and a bag of water. When they combine it becomes cold ammonium nitrate (it is harmful).

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It is amonium nitrate cyrstals and water. When you pop the water pack the two undergo an endothermic reaction. Pretty much you are making new compounds, these compounds are ions(NH4+ & NO3-). Water breaks the two parts of NH4NO3 into the positive and negative parts, and it takes heat energy from the surrounding area to make the seperation. When it dries it recombines and releases that heat (not observed because water gets colder when it evaporates). So if you CAREFULLY cut that bag open and dry it, it will do the same thing again. I wouldn't want to eat the cyrstals or the end liquid. plant fertilizers don't make good food.

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It is actually not a liquid. A waterbag activates a chemical inside an outter pack, usually Ammonium Nitrate. However, because of its potential danger, a Urea Based pack with non-toxic addatives has become the norm to create a icy sensation. I believe only one company manufactures this specific composition, called the InstaKool by Nortech.

Nortech Laboratories, Inc. www.instakool.com

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I have not been able to locate an instant cold pack that doesn't use amonium nitrate... can any one provide a site or a number .

www.nortechlabs.com 631-501-1451 1-888-COLD-PAK http://nortechlaboratories.com/news.htm

First answer by ID0000000000. Last edit by Neila222. Contributor trust: 1704 [recommend contributor]. Question popularity: 244 [recommend question]