IPC Subgroup
C01C 1/242 Preparation from ammonia and sulfuric acid or sulfur trioxide
Introduced: July 1974
Last revised: January 2006
Full Title
Ammonia; Compounds thereof > Sulfates of ammonium > Preparation from ammonia and sulfuric acid or sulfur trioxide
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- AMMONIA; CYANOGEN; COMPOUNDS THEREOF