DIFF Subgroup
B01J 27/057 Selenium or tellurium; Compounds thereof
Introduced: January 1985
Full Title
Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds > Sulfur, selenium or tellurium; Compounds thereof > Selenium or tellurium; Compounds thereof
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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