The Merck Index: An Encyclopedia Of Chemicals, ... May 2026

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

: First published in 1899 by Merck & Co. as a catalog of medicinal substances. The Merck Index: An Encyclopedia of Chemicals, ...

: Hazard classifications, handling precautions, and toxicity data. History and Publishing The Merck Index: An Encyclopedia of Chemicals, ...

: In 2012, the Royal Society of Chemistry (RSC) acquired the rights to publish the index. The Merck Index: An Encyclopedia of Chemicals, ...