The Merck Index: An Encyclopedia Of Chemicals, ... -

: First published in 1899 by Merck & Co. as a catalog of medicinal substances.

is the globally recognized "Chemistry's Constant Companion," providing a comprehensive database of over 10,000 monographs. Since its first publication in 1889, it has served as an authoritative reference for chemical, pharmaceutical, and biomedical information. Scope and Purpose The Merck Index: An Encyclopedia of Chemicals, ...

Each entry (monograph) follows a standardized format to ensure rapid data retrieval: : First published in 1899 by Merck & Co