| IPC 7 English version |
| C01C-C01C00320 |
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| SECTION C – CHEMISTRY; METALLURGY |
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| C 01 | INORGANIC CHEMISTRY (processing powders of inorganic compounds preparatory to the manufacturing of ceramic products C04B 35/00; fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide C12P 3/00; obtaining metal compounds from mixtures, e.g. ores, which are intermediate compounds in a metallurgical process for obtaining a free metal C21B, C22B; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis C25B) |
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| C 01 C | AMMONIA; CYANOGEN; COMPOUNDS THEREOF (salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; thiosulfates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; azides C01B 21/08; metal amides C01B 21/092; nitrites C01B 21/50; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00) |
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| Note |
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| Therapeutic activity of compounds is further classified in subclass A61P. [7] |
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1/ | 00 | Ammonia; Compounds thereof |
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1/ | 02 | . | Preparation or separation of ammonia |
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1/ | 04 | . | . | Preparation of ammonia by synthesis (preparation or purification of gas mixtures for ammonia synthesis C01B 3/02) |
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1/ | 08 | . | . | Preparation of ammonia from nitrogenous organic substances |
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1/ | 10 | . | . | Separation of ammonia from ammonia liquors, e.g. gas liquors |
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1/ | 12 | . | . | Separation of ammonia from gases and vapours |
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1/ | 14 | . | . | . | Saturators |
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1/ | 16 | . | Halides of ammonium |
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1/ | 18 | . | Nitrates of ammonium |
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1/ | 20 | . | Sulfides; Polysulfides |
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1/ | 22 | . | Sulfites of ammonium |
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1/ | 24 | . | Sulfates of ammonium (C01C 1/14 takes precedence) |
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1/ | 242 | . | . | Preparation from ammonia and sulfuric acid or sulfur trioxide [2] |
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1/ | 244 | . | . | Preparation by double decomposition of ammonium salts with sulfates [2] |
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1/ | 245 | . | . | Preparation from compounds containing nitrogen and sulfur [2] |
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1/ | 246 | . | . | . | from sulfur-containing ammonium compounds [2] |
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1/ | 247 | . | . | . | . | by oxidation with free oxygen [2] |
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1/ | 248 | . | . | Preventing coalescing or controlling form or size of crystals [2] |
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1/ | 249 | . | . | Deacidifying the crystals [2] |
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1/ | 26 | . | Carbonates or bicarbonates of ammonium |
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1/ | 28 | . | Methods of preparing ammonium salts in general |
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| Notes |
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| (1) | This group does not cover ammonium salts of complex acids (other than complex cyanides) containing a metal in the anion, which are covered by the relevant groups of subclasses C01D to C01G, according to the metal. |
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| (2) | Salts of polybasic acids with ammonium and a metal as cations are classified as though the ammonium were hydrogen. |
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| (3) | Complex ammine salts are classified in the relevant groups of subclasses C01D to C01G, according to the metal. |
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3/ | 00 | Cyanogen; Compounds thereof |
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3/ | 02 | . | Preparation of hydrogen cyanide |
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3/ | 04 | . | . | Separation from gases |
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3/ | 06 | . | Stabilisation of hydrogen cyanide |
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3/ | 08 | . | Simple or complex cyanides of metals |
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3/ | 10 | . | . | Simple alkali metal cyanides [3] |
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3/ | 11 | . | . | Complex cyanides [3] |
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3/ | 12 | . | . | Simple or complex iron cyanides [2] |
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3/ | 14 | . | Cyanic acid; Salts thereof |
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3/ | 16 | . | Cyanamide; Salts thereof (dicyandiamide C07C 279/28) |
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3/ | 18 | . | . | Calcium cyanamide |
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3/ | 20 | . | Thiocyanic acid; Salts thereof |
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