Hydrogen is a colourless, odourless, tasteless, non-toxic but, highly combustible gas that is lighter than air.

Liquid hydrogen is the most common form used for transportation at temperatures of -253 degrees Celsius. However, it is also transported as a high pressure gas in specialised tube skid trailers if long transit times are expected as hydrogen exists in two isomeric forms, dihydrogen and parahydrogen when liquefied.

Industrial production includes the process of steam reforming natural gas or the more energy intensive method of splitting water by electrolysis.

Hydrogen main use is associated with the processing of fossil fuels (hydrocracking) and the production of ammonia (fertilizers). Other uses include cryogenic research (liquid hydrogen)

Hydrogen is a concern in industrial applications as it can embrittle many metals components compromising the structural integrity which has consequences  for both pipeline design and storage facilities.