For over 120 years The Merck Index has been regarded as the most authoritative and reliable source of information on chemicals, drugs and biologicals. Now this trusted resource is available online from the Royal Society of Chemistry.

The Merck Index* Online offers the same highly authoritative information as the print edition in a convenient and easily searchable full text database. It contains over 11,500 monographs – including historic records not available in the print edition. The Merck Index* Online will be updated regularly with accurate information curated by experts.