Reference tables

The PDF links below provide useful information relating to general chemical conventions and terms that appear in The Merck Index* Online. They are based on the supplemental tables provided in the print edition of The Merck Index.

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  • Abbreviations
  • Acronyms
  • Alchemical Symbols Used in Biology and Botany
  • Amino Acids Found in Proteins
  • Atomic Weights
  • Chemical Terms Translator
  • Code Letters Used by Companies for Experimental Substances
  • Common Heterocyclic Ring Systems
  • Company Register
  • Fundamental Physical and Mathematical Constants
  • Glossary
  • Greek Alphabet
  • International Patent Country Codes
  • International System of Units (SI)
  • Latin Terms
  • Nonproprietary Name Stems
  • Numerical Prefixes Commonly Used in Forming Chemical Names
  • Periodic Chart of the Elements
  • Prescription Notation
  • Radioactive Isotopes Used in Medical Diagnosis and Therapy
  • Roman Numerals
  • Russian Alphabet
  • Selected Hexoses and Pentoses
  • Table of Minerals
  • Terms for Radicals and Groups Used for Nonproprietary Names
  • Thermometric Equivalents
  • Universal Conversion Factors
  • Vaccines