C
SECTION C — CHEMISTRY AND METALLURGY
  
CHEMISTRY
 C07
ORGANIC CHEMISTRY (such compounds as the oxides, sulphides, and oxysulphides of carbon, cyanogen, phosgene, hydrocyanic acid and salts thereof C01; macromolecular compounds C08; dyes C09; fermentation products C12)
 C07

Note(s)

  1. 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 C07C 87/52), sodium oxalate is classified as oxalic acid (in C07C 55/06), 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 C07C and not in C07F— the alcoholates in C07C 31/28-C07C 31/32 and the phenates as the corresponding phenols in C07C 39/00.
  2. In the absence of an indication to the contrary, and with the exception referred to below, a compound is always classified in the last appropriate place in the classification system, e.g. a compound containing an acyclic chain and a heterocyclic ring is classified only as a heterocyclic compound, and a sterol is classified only as a cyclopentanophenanthrene compound. In general, and in the absence of an indication to the contrary (such as groups C07C 59/24, C07C 59/26), 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.
  3. Albumens, proteins, alkaloids of unknown structure, glucosides of unknown structure are examples of compounds to be found unter C07G.
  4. Inventions dealing with the preparation of chemical compounds might be classified both according to the type of reaction employed and according to the type of compound prepared, if suitable groups or sub-groups exits.
 C07G
COMPOUNDS OF UNKNOWN CONSTITUTION
 C07G 1/00
Lignin; Lignin derivatives
 C07G 3/00
Glycosides (polysaccharides C08B)
 C07G 5/00
Alkaloids
 C07G 7/00
Proteins; Albumens; Nucleoproteins; Degradation products of proteins (foodstuffs A23)
 C07G 7/02
·  Enzymes
 C07G 7/022
·  ·  extraction from plants
 C07G 7/024
·  ·  ·  from malt
 C07G 7/026
·  ·  extraction from animal material
 C07G 7/028
·  ·  extraction from micro-organisms
 C07G 7/03
·  ·  ·  from yeast
 C07G 7/04
·  Metal compounds
 C07G 7/06
·  ·  of keratin or its degradation products
 C07G 9/00
Ichthyol
 C07G 11/00
Antibiotics
 C07G 13/00
Vitamins (vitamin K C07C 49/66; pantothenic acid C07C 103/50; vitamins of the D group C07C 171/10; vitamin A C07C 175/00; vitamin C C07D 5/12; tocopherols C07D 7/22; pyridoxin C07D 31/30; pyridoxal C07D 31/32; pyridoxamin C07D 31/42; vitamin B12C07D 55/62; riboflavin C07D 57/32; lipoic acid, derivatives thereof C07D 71/04; biotin C07D 99/08; vitamin B 1 C07D 99/12; sideramines, corresponding desferri compounds C07F 15/03)
 C07G 15/00
Hormones
 C07G 17/00
Other compounds of unknown constitution