Nitrous oxide Nitrous oxide Nitrous oxide, commonly known as laughing gas or nitrous, is a chemical compound, an oxide of nitrogen with the formula . At room temperature, it is a colourless non-flammable gas, with a slight metallic scent and taste. At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen. It is soluble in water. Nitrous oxide has significant medical uses, especially in surgery and dentistry, for its anaesthetic and pain reducing effects. Its name "laughing gas", coined by Humphry Davy, is due to the euphoric effects upon inhaling it, a property that has led to its recreational
CS gas under-mask decontamination are also practised. Some Norwegian units are exposed to CS gas while engaged in mental and physical activity such as addressing the officer in command by stating name, rank and troop before doing 30 push-ups. France repeatedly used CS gas against refugees in camps around Calais in 2015. In Australia, prison officers used CS gas against five teenage boys in Darwin's Don Dale Juvenile Detention Centre in August 2014. CS gas The compound 2-chlorobenzalmalononitrile (also called o-chlorobenzylidene malononitrile; chemical formula: CHClN), a cyanocarbon, is the defining component of a tear gas commonly referred to as CS gas, which