Air liquide (AL), formerly L'Air liquide, is a French international industrial group specialising in industrial gases, i.e. gases for industry, health, the environment and research. It is present in 80 countries around the world. The Air liquide group is listed on the Paris Stock Exchange and is included in the CAC 40 index.
The world's leading group in the sector, its main competitor remains Linde, followed by two American groups: Praxair and Air Products. Together, they are considered to be the dominant players in the industrial gas market.