IPC Main Group
C01B 21/00 Nitrogen; Compounds thereof
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
Related Keywords
NITROGENother inorganic compounds of NITROGEN
6 direct subcodes
Child Classifications
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- C01B 21/02 Preparation of nitrogen
- C01B 21/04 Purification or separation of nitrogen
- C01B 21/06 Binary compounds of nitrogen with metals, with silicon, or with boron
- C01B 21/08 Hydrazoic acid; Azides; Halogen azides
- C01B 21/082 Compounds containing nitrogen and non-metals
- C01B 21/2 Nitrogen oxides; Oxyacids of nitrogen; Salts thereof