Endothermic / exothermic reaction

[hamudi786]

Hello,
I need a few compounds that i can use that are soluble with water that causes the water to cool, so that if ingested it will not do any harm. your advice would be greatly appreciated, also if you may include a chemical formula if it is known. THANK YOU.

P.S. this is out of interest. no ingestion will occur LOL

 

[SpectraCat]

Hello,
I need a few compounds that i can use that are soluble with water that causes the water to cool, so that if ingested it will not do any harm. your advice would be greatly appreciated, also if you may include a chemical formula if it is known. THANK YOU.

P.S. this is out of interest. no ingestion will occur LOL

Dissolution of solid ammonium nitrate is a classic example of an endothermic process (I think that is how those one-time break-seal cold packs work). There are other examples, but this should be enough to get you started with a google search. None of them should ever be considered "safe for ingestion", in my opinion.