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| SECTION C– CHEMISTRY; METALLURGY |
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| C 07 | ORGANIC CHEMISTRY (such compounds as the oxides, sulfides, or oxysulfides of carbon, cyanogen, phosgene, hydrocyanic acid or salts thereof C 01; products obtained from layered base-exchange silicates by ion-exchange with organic compounds such as ammonium, phosphonium or sulfonium compounds or by intercalation of organic compounds C 01 B 33/44; macromolecular compounds C 08; dyes C 09; fermentation products C 12; fermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture C 12 P; production of organic compounds by electrolysis or electrophoresis C 25 B 3/00, C 25 B 7/00) |
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| Notes |
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| (1) | In this class, the following term is used with the meaning indicated: |
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| – | "preparation" covers purification, separation, stabilisation or use of additives, unless a separate place is provided therefor. [4] |
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| (2) | In this class, in the absence of an indication to the contrary, and with the exception referred to below, a compound is classified in the last appropriate place, e.g. a compound containing an acyclic chain and a heterocyclic ring is classified only as a heterocyclic compound, and a steroid is classified only as a cyclopentanophenanthrene compound. In general, and in the absence of an indication to the contrary (such as groups C 07 C 59/58, C 07 C 59/70), the terms "acyclic" and "aliphatic" are used to describe compounds in which there is no ring; and, if a ring were present, the compound would be taken by the "last place" rule to a later group for cycloaliphatic or aromatic compounds, if such a group exists. Where a compound or an entire group of compounds exists in tautomeric forms, it is classified as though existing in the form which is classified last in the system, unless the other form is specifically mentioned earlier in the system. |
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| (3) | Chemical compounds and their preparation are classified in the groups for the type of compound prepared. The processes of preparation are also classified in the groups for the types of reaction employed, if of interest. General processes for the preparation of a class of compounds falling into more than one main group are classified in the groups for the processes employed, when such groups exist. The compounds prepared are also classified in the groups for the types of compound prepared, if of interest. |
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| (4) | In this class, in the absence of an indication to the contrary, the compounds containing carboxyl or thiocarboxyl groups are classified as the relevant carboxylic or thiocarboxylic acids, unless the "last place rule" (see Note (2), above) dictates otherwise; a carboxyl group being a carbon atom having three bonds, and no more than three, to hetero atoms, other than nitrogen atoms of nitro or nitroso groups, with at least one multiple bond to the same hetero atom and a thiocarboxyl group being a carboxyl group having at least one bond to a sulfur atom, e.g. amides or nitriles of carboxylic acids, are classified with the corresponding acids. [5] |
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| (5) | Salts of a compound, unless specifically provided for, are classified as that compound, e.g. aniline hydrochloride is classified as containing carbon, hydrogen and nitrogen only (in group C 07 C 211/46), sodium malonate is classified as malonic acid (in C 07 C 55/08), and a mercaptide is classified as the mercaptan. Metal chelates are dealt with in the same way. Similarly, metal alcoholates and metal phenates are classified in subclass C 07 C and not in subclass C 07 F, the alcoholates in groups C 07 C 31/28 to C 07 C 31/32 and the phenates as the corresponding phenols in group C 07 C 39/235 or C 07 C 39/44. Salts, adducts or complexes formed between two or more organic compounds are classified according to all compounds forming the salts, adducts or complexes [2] |
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| (6) | The codes of subclass C 07 M are only for use as indexing codes associated with subclasses C 07 B to C 07 K, so as to provide information concerning specific properties of organic compounds. [6] |
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| C 07 B | GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR (preparation of carboxylic acid esters by telomerisation C 07 C 67/47; telomerisation C 08 F) |
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| C 07 C | ACYCLIC OR CARBOCYCLIC COMPOUNDS |
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| C 07 D | HETEROCYCLIC COMPOUNDS [2] |
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| C 07 F | ACYCLIC, CARBOCYCLIC, OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM, OR TELLURIUM (metal-containing porphyrins C 07 D 487/22) |
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| C 07 G | COMPOUNDS OF UNKNOWN CONSTITUTION |
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| C 07 H | SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS (derivatives of aldonic or saccharic acids C 07 C, C 07 D; aldonic acids, saccharic acids C 07 C 59/105, C 07 C 59/285; cyanohydrins C 07 C 255/16; glycals C 07 D; compounds of unknown constitution C 07 G; polysaccharides, derivatives thereof C 08 B; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification C 12 N 15/00; sugar industry C 13) |
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| C 07 J | STEROIDS (seco-steroids C 07 C) |
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| C 07 K | PEPTIDES (peptides in foodstuffs A 23, e.g. obtaining protein compositions for foodstuffs A 23 J; preparations for medicinal purposes A 61 K; peptides containing ß-lactam rings C 07 D; cyclic dipeptides not having in their molecule any other peptide link than those which form their ring, e.g. piperazine-2,5-diones, C 07 D; ergot alkaloids of the cyclic peptide type C 07 D 519/02; macromolecular compounds having statistically distributed amino acid units in their molecules, i.e. when the preparation does not provide for a specific, but for a random sequence of the amino acid units, homopolyamides and block copolyamides derived from amino acids C 08 G 69/00; macromolecular products derived from proteins C 08 H 1/00; preparation of glue or gelatine C 09 H; single cell proteins, enzymes C 12 N; genetic engineering processes for obtaining peptides C 12 N 15/00; compositions for measuring or testing processes involving enzymes C 12 Q; investigation or analysis of biological material G 01 N 33/00) |
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| C 07 M | INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C 07 B TO C 07 K, RELATING TO SPECIFIC PROPERTIES OF ORGANIC COMPOUNDS [6] |
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