--subdivision Analysis under substances or chemicals for works on methods of analyzing these items or analyzing a sample to determine the presence or quantity of these items, and for works presenting the results of analyzing substances not produced naturally, e.g. Concrete--Analysis; Corn--Analysis
Here are entered works on the study of naturally occurring chemical reactions in organisms. Works on the use of chemistry and chemical techniques to study biological systems are entered under Chemical biology. --subdivision Composition under individual animals and groups of animals, e.g. Fishes--Composition; Cattle--Composition
--groups of chemicals, e.g. Acids; Alkalies; Explosives; Nitrogen compounds; and individual chemical substances, e.g. Antimony; Barium; Cupric chloride; Phenol
Here are entered general works on organic chemistry. Works on special groups of carbon compounds and their reactions are entered under Carbon compounds. --groups and classes of organic compounds and individual organic substances
Here are entered works on the chemical changes in the environment that occur naturally or that are due to pollutants. Works on developing and using chemical technology in a way that limits adverse effects on the natural environment are entered under Green chemistry