Ammonia (azane) is a chemical compound that consists in one nitrogen atom and three hydrogen atoms, giving the following formula : NH3. It has no colour, but its smell instead can take the form of a strong-smelling liquid or gas. Ammonia servs as a precursor to food and fertilizers, playing a huge role  in the nutritional needs of terrestrial organisms. Although in wide use ammonia is dangerous, it’s an important element in for the synthesis of many pharmaceuticals and it’s also included in many cleaning products. In 2006, worldwide production was estimated at 146.5 million tonnes.

When used commercially, ammonia is called “anhydrous ammonia”, meaning the absence  of water in  the substance’s composition. Given the fact ammonia (NH3) boils at −33.34 °C (−28.012 °F) at a pressure of 1 atmosphere, it is necessary that the liquid is stored under high pressure or at low temperature. The concentrations of these kind of solutions are usually measured using the Baumé scale (density). Household ammonia ranges in concentration from 5 to 10 weight percent ammonia.


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