ammonia

The Severnside Works on the banks of the Bristol Channel is a plant for the manufacture of ammonia and ammonia products. Its location was chosen as it is accessible by road, river, and rail, so raw materials and finished products can be easily transported.

Colourless pungent-smelling gas, lighter than air and very soluble in water. It is made on an industrial scale by the Haber (or Haber-Bosch) process, and used mainly to produce nitrogenous fertilizers, nitric acid, and some explosives.

In aquatic organisms and some insects, nitrogenous waste (from the breakdown of amino acids) is excreted in the form of ammonia, rather than as urea in mammals.