Searching in a library catalog requires looking for broader topics such as food chemistry or environmental chemistry rather than the more specific phenolic antioxidants in grapefruit or GC/MS in pesticide chemistry.
Library of Congress Classification for Chemistry
CLASS Q SCIENCE
Subclass QD Chemistry
QD1-999 Chemistry
QD1-65 Chemistry, General - Including alchemy
QD71-142 Analytical Chemistry
QD146-197 Inorganic Chemistry
QD241-441 Organic Chemistry
QD415-436 Biochemistry
QD450-801 Physical and Theoretical Chemistry
QD625-655 Radiation Chemistry
QD701-731 Photochemistry
QD901-999 Crystallography
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