C
SECTION C — CHEMISTRY AND METALLURGY
 C

Note(s)

Definitions for Section C:

  • Alkali metals: Li, Na, K, Rb, Cs, Fr
  • Alkaline earth metals: Ca, Sr, Ba, Ra
  • Lanthanides: elements with atomic numbers 57 to 71 inclusive
  • Rare earths: Sc, Y, Lanthanides
  • Actinides: elements with atomic numbers 89 to 103 inclusive
  • Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
  • Halogens: F, Cl, Br, I, At
  • Noble gases: He, Ne, Ar, Kr, Xe, Rn
  • Platinum group: Os, Ir, Pt, Ru, Rh, Pd
  • Noble metals: Ag, Au, Platinum group
  • Light metals: alkali metals, alkaline earth metals, Be, Al, Mg
  • Heavy metals: metals other than light metals
  • Iron group: Fe, Co, Ni
  • Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens
  • Metals: elements other than non-metals
  • Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

  
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; fermentation or enzyme-using processes to synthesise a desired chemical compound C12P; production of organic compounds by electrolysis or electrophoresis C25B 3/00)  [2]
 C07

Note(s)

  1. Anhydrides and halides of carboxylic acids are classified as the relevant acids unless otherwise indicated. 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 malonate is classified as malonic acid (in C07C 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 sub-class C07C and not in sub-class C07F— the alcoholates in C07C 31/28-C07C 31/32 and the phenates as the corresponding phenols in C07C 39/235 or C07C 39/44. Salts or adducts formed between two or more organic compounds are classified according to all compounds forming the salts or adducts. [2]
  2. 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 C07C 59/58, C07C 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.
  3. Albumens, proteins, alkaloids of unknown structure, glucosides of unknown structure are examples of compounds to be found unter C07G.
  4. Inventions dealing with chemical compounds and their preparation are classified in the groups for the type of compound prepared. The processes of preparation should be secondarily classified in the groups for the types of reaction employed when such groups exist. 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 may be secondarily classified in the groups for the types of compounds prepared.
 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; enzymes C12N 9/00, C12N 11/00)  [2]
 C07G 7/02 - 
C07G 7/03
( transferred to C12N 9/00, C12N 11/00 )
 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 K1C07C 50/14; pantothenic acid C07C 103/50; vitamins of the D group C07C 172/00; vitamin A C07C 175/00; pyridoxal, pyridoxamin C07D 213/66; pyridoxin C07D 213/67; vitamin C C07D 307/62; tocopherols C07D 311/72; lipoic acid C07D 339/04; vitamin B1C07D 415/00; riboflavin C07D 487/04; biotin C07D 495/04; sideramines, corresponding desferri compounds C07F 15/03; vitamin B12C07H 23/00)
 C07G 15/00
Hormones
 C07G 17/00
Other compounds of unknown constitution