Statistical Classification of Economic Activities NACE Rev. 2.0

This class includes:
- manufacture of liquefied or compressed selected inorganic industrial or medical gases:
elemental gases
liquid or compressed air
mixed industrial gases
inert gases (e.g. carbon dioxide)
isolating gases
This class also includes:
- production of hydrogen, not for energy supply through a network
This class excludes:
- extraction of methane, ethane, butane or propane, see 06.20
- liquefaction and regasification of natural gas for the purpose of transport, done at the mine site, see 09.10
- manufacture of fuel gases (e.g. ethane, butane or propane in a petroleum refinery), see 19.20
- manufacture of refrigerant gases of halogenated hydrocarbons, see 20.14
- manufacture of gaseous fuels from coal, waste, etc., see 35.21
- manufacture of hydrogen for the provision as a gaseous fuel through a permanent supply network, see 35.21

This class includes the manufacture of chemicals using basic processes (for example, thermal cracking, distillation). The output of these processes is usually separate chemically defined organic compounds.

This class includes:
- manufacture of basic organic chemicals:
acyclic hydrocarbons, saturated and unsaturated
cyclic hydrocarbons, saturated and unsaturated
acyclic and cyclic alcohols
mono- and polycarboxylic acids, including acetic acid
other oxygen-function compounds, including aldehydes, ketones, quinones and dual or poly oxygen-function compounds
synthetic glycerol
nitrogen-function organic compounds, including amines
fermentation of sugar cane, corn or similar to produce alcohol and esters
other organic compounds, including wood distillation products (e.g. charcoal), etc.
- manufacture of synthetic aromatic products
- manufacture of methane, not for the provision as a gaseous fuel through a permanent supply network
- distillation of coal tar
- manufacture of ethyl alcohol, other than for bioethanol fuel
- manufacture of refrigerant gases

This class excludes:
- extraction of natural gas, consisting predominantly of methane, see 06.20
- manufacture of plastics in primary forms, see 20.16
- manufacture of synthetic rubber in primary forms, see 20.17
- manufacture of crude glycerol, see 20.41
- manufacture of liquid biofuels (e.g. bioethanol fuel), see 20.51
- manufacture of natural essential oils, see 20.59
- manufacture of salicylic and O-acetylsalicylic acids, see 21.10
- manufacture of ethanol from biomass, see 20.51
- production of methane for the provision as a gaseous fuel through a permanent supply network, see 35.21