Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material

Narrower term/s

• alkane[+]
  • methane
• acetylene
• tetrachloroethylene
• stilbene

Anotations

Scope note:

A member of a large group of organic chemicals, containing only the elements hydrogen and carbon. They are major constituents of crude petroleum and natural gas, from which certain fractions are extracted for use as fuel and as raw materials for the chemical industry.