Concept information
Preferred term
661Chemicals
Broader concept
Narrower concepts
- 661.8 Metallic compounds in general. Salts. Mineral compounds
- 661.9 Production of gases
- 661.4 Production of halogens and halogen compounds, inorganic peroxo-compounds
- 661.5 Production of nitrogen compounds. Fixation of nitrogen. Nitrogen industry in general
- 661.7 Production of organic substances. Organic chemicals
- 661.3 Production of soda and potash, alkalis
- 661.2 Production of sulphur and its derivatives
- 661.6 Production of various nonmetals and semimetals (metalloids), and their compounds
- 661.1 Special chemical industries
Note
- Details by colon combination with the subdivision of 546 or 547
Scope note
- Class here the production of chemicals; also the chemicals themselves (chemical products), especially from the point of view of their further processing and utilization
Notation
- 661
In other languages
-
Portuguese
URI
http://udcdata.info/055582
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