In section C, the definitions of groups of chemical elements are as follows:
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
Section C covers:
pure chemistry, which covers inorganic compounds, organic compounds, macromolecular compounds, and their methods of preparation;
applied chemistry, which covers compositions containing the above compounds, such as: glass, ceramics, fertilisers, plastics compositions, paints, products of the petroleum industry. It also covers certain compositions on account of their having particular properties rendering them suitable for certain purposes, as in the case of explosives, dyestuffs, adhesives, lubricants, and detergents;
certain marginal industries, such as the manufacture of coke and of solid or gaseous fuels, the production and refining of oils, fats and waxes, the fermentation industry (e.g., brewing and wine-making), the sugar industry;
certain operations or treatments, which are either purely mechanical, e.g., the mechanical treatment of leather and skins, or partly mechanical, e.g., the treatment of water or the prevention of corrosion in general;
metallurgy, ferrous or non-ferrous alloys.
In the case of operations, treatments, products or articles having both a chemical and a non-chemical part or aspect, the general rule is that the chemical part or aspect is covered by section C.
In some of these cases, the chemical part or aspect brings with it a non-chemical one, even though purely mechanical, because this latter aspect either is essential to the operation or treatment or constitutes an important element thereof. It has seemed, in fact, more logical not to dissociate the different parts or aspects of a coherent whole. This is the case for applied chemistry and for the industries, operations and treatments mentioned in Notes (1)(c), (d) and (e). For example, furnaces peculiar to the manufacture of glass are covered by class Fulltext... Hierarchy... Expanded...C03 and not by class Fulltext... Hierarchy... Expanded...F27.
There are, however, some exceptions in which the mechanical (or non-chemical) aspect carries with it the chemical aspect, for example:
Photographic materials and processes, in class Fulltext... Hierarchy... Expanded...G03, and, generally, the chemical treatment of textiles and the production of cellulose or paper, in section D.
In still other cases, the pure chemical aspect is covered by section C and the applied chemical aspect by another section, such as A, B or F, e.g., the use of a substance or composition for:
When the chemical and mechanical aspects are so closely interlocked that a neat and simple division is not possible, or when certain mechanical processes follow as a natural or logical continuation of a chemical treatment, section C may cover, in addition to the chemical aspect, a part only of the mechanical aspect, e.g., after-treatment of artificial stone, covered by class Fulltext... Hierarchy... Expanded...C04. In this latter case, a note or a reference is usually given to make the position clear, even if sometimes the division is rather arbitrary.
In this class, the following term is used with the meaning indicated:
"preparation" covers purification, separation, stabilisation or use of additives, unless a separate place is provided therefor. [4]
Biocidal, pest repellant, pest attractant or plant growth regulatory activity of compounds or preparations is further classified in subclass Fulltext... Hierarchy... Expanded...A01P. [8]
In subclasses Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C07C-C07K and within each of theses subclasses, 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. For example, 2-butyl-pyridine, which contains an acyclic chain and a heterocyclic ring, is classified only as a heterocyclic compound, in subclass Fulltext... Hierarchy... Expanded...C07D. In general, and in the absence of an indication to the contrary (such as groups Fulltext... Hierarchy... Expanded...C07C 59/58, Fulltext... Hierarchy... Expanded...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.
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.
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 (3), 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]
In this subclass, the functional group which is present already in some residue being introduced and is not substantially involved in a chemical reaction, is not considered as the functional group which is formed or introduced as a result of the chemical reaction. [4]
In this subclass, the following term is used with the meaning indicated:
"separation" means separation only for the purposes of recovering organic compounds. [4]
When classifying in this subclass, classification is also made in group Fulltext... Hierarchy... Expanded...B01D 15/08 insofar as subject matter of general interest relating to chromatography is concerned. [8]
In this subclass, in the absence of an indication to the contrary, classification is made in the last appropriate place according to the type of reaction employed, noting the bond or the functional group which is formed or introduced as a result of the chemical reaction. [4]
C07B
Subclass index
REACTIONS WITHOUT FORMATION OR INTRODUCTION OF FUNCTIONAL GROUPS CONTAINING HETERO ATOMS
Change of bond type between carbon atoms already directly linked
Reactions without formation or introduction of functional groups containing hetero atoms [4]
P:120
C07B 35/00
Reactions without formation or introduction of functional groups containing hetero atoms, involving a change in the type of bonding between two carbon atoms already directly linked [4]
C07B 35/02
·
Reduction [4]
C07B 35/04
·
Dehydrogenation [4]
C07B 35/06
·
Decomposition, e.g. elimination of halogens, water or hydrogen halides [4]
C07B 35/08
·
Isomerisation [4]
P:110
C07B 37/00
Reactions without formation or introduction of functional groups containing hetero atoms, involving either the formation of a carbon-to-carbon bond between two carbon atoms not directly linked already or the disconnection of two directly linked carbon atoms [4]
C07B 37/02
·
Addition [4]
C07B 37/04
·
Substitution [4]
C07B 37/06
·
Decomposition, e.g. elimination of carbon dioxide [4]
C07B 37/08
·
Isomerisation [4]
C07B 37/10
·
Cyclisation [4]
C07B 37/12
· ·
Diels-Alder reactions [4]
C07B 39/00 - C07B 47/00
Reactions with formation or introduction of functional groups containing hetero atoms [4]
P:90
C07B 39/00
Halogenation [4]
P:80
C07B 41/00
Formation or introduction of functional groups containing oxygen [4]
C07B 41/02
·
of hydroxy or O-metal groups [4]
C07B 41/04
·
of ether, acetal or ketal groups [4]
C07B 41/06
·
of carbonyl groups [4]
C07B 41/08
·
of carboxyl groups or salts, halides or anhydrides thereof [4]
C07B 41/10
· ·
Salts, halides or anhydrides of carboxyl groups [4]
C07B 41/12
·
of carboxylic acid ester groups [4]
C07B 41/14
·
of peroxy or hydroperoxy groups [4]
P:70
C07B 43/00
Formation or introduction of functional groups containing nitrogen [4]
C07B 43/02
·
of nitro or nitroso groups [4]
C07B 43/04
·
of amino groups [4]
C07B 43/06
·
of amide groups [4]
C07B 43/08
·
of cyano groups [4]
C07B 43/10
·
of isocyanate groups [4]
P:60
C07B 45/00
Formation or introduction of functional groups containing sulfur [4]