LCC - Library of Congress Classification
Q - Science
QD - Chemistry
QD1-65 General Chemistry
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