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
The following notes are meant to assist in the use of this part of the classification scheme. They must not be read as modifying in any way the elaborations.
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.
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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.
Anti-slip materials; Abrasives (manufacture of abrasive or friction articles or shaped materials, containing macromolecular substances Fulltext... Hierarchy... Expanded...C08J 5/14) [4]
C09K 3/16
·
Anti-static materials [4]
C09K 3/18
·
for application to surface to minimize adherence of ice, mist or water thereto (rendering particulate materials free flowing, in general, e.g. making them hydrophobic, Fulltext... Hierarchy... Expanded...B01J 2/30); Thawing or antifreeze materials for application to surfaces (used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, Fulltext... Hierarchy... Expanded...C09K 5/00) [4]
C09K 3/20
·
as substitutes for glycerol in its non-chemical uses, e.g. as a base in toilet creams or ointments
Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion [2]
In this group, compositions are classified according to their major constituent. [2]
C09K 7/02
·
Aqueous fluids containing organic or inorganic compounds [2]
C09K 7/04
· ·
containing inorganic compounds only [2]
C09K 7/06
·
Non-aqueous liquids, e.g. oil-based [2]
C09K 7/08
·
Gaseous fluids [2]
C09K 9/00
Tenebrescent materials, i.e. materials for which the range of wavelengths for energy adsorption is changed as a result of excitation by some form of energy (photosensitive materials for photographic purposes Fulltext... Hierarchy... Expanded...G03C) [2]
C09K 9/02
·
Organic tenebrescent materials [2]
C09K 11/00
Luminescent, e.g. electroluminescent, chemiluminescent, materials [2]
C09K 11/01
·
Recovery of luminescent materials [3]
C09K 11/02
·
Use of particular materials as binders, particle coatings or suspension media therefor [2]
C09K 11/04
·
containing natural or artificial radioactive elements or unspecified radioactive elements [2]
C09K 11/06
·
containing organic luminescent materials [2]
C09K 11/07
· ·
having chemically-interreactive components, e.g. reactive chemiluminescent compositions [3]
This group covers mixtures of soil-conditioning or soil-stabilising materials with fertilisers characterised by their soil-conditioning or soil-stabilising activity. [6]
This group does not cover mixtures of soil-conditioning or soil-stabilising materials with fertilisers characterised by their fertilising activity which are covered by subclass Fulltext... Hierarchy... Expanded...C05G. [6]
For the purpose of classification in this group, the presence of fertilisers in the composition is not taken into account. [6]
Indexing scheme associated with group Fulltext... Hierarchy... Expanded...C09K 17/00, relating to the use or the intended effect of the soil-conditioning or soil-stabilising materials. The indexing codes should be unlinked. [6]
C09K 101/00 - C09K 109/00
Note(s)
Attention is drawn to Chapter IV of the Guide which sets forth the rules concerning the application and presentation of the different types of indexing code. [6]