Hydrogen is one of the most important industrial commodities. Physical thermodynamic, and chemical properties are described. The chemistry of hydrogen from a commercial perspective is followed by a description of manufacturing methods. Steam reforming of hydrocarbons and partial oxidiation of hydrocarbons account for almost all hydrogen production. Other, less conventional manufacturing methods are also presented, such as produced as a by‐product of chemical processes. Hydrogen purification is reviewed. The storage of hydrogen is discussed, including conventional methods for gas and liquid storage, and possible future methods, such as in metal hydride systems and microcapsules. Analysis of hydrogen, specifications health and safety issues, recycling, and environmental considerations are discussed. Hydrogen consumption figures are presented, and the possible future usage of hydrogen is discussed.

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