CPC Subgroup
C01B 21/087 containing one or more hydrogen atoms
Full Title
Nitrogen; Compounds thereof > Compounds containing nitrogen and non-metals (C01B21/06, C01B21/08 take precedence) > containing one or more hydrogen atoms
3 direct subcodes
Child Classifications
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- C01B 21/088 containing also one or more halogen atoms
- C01B 21/092 containing also one or more metal atoms
- C01B 21/093 containing also one or more sulfur atoms