The Merck Index data that you have come to trust in the hard copy is now available on five different platforms. Semi-annual updates contain material not yet available in print. Electronic versions are co-published with the following vendors and require a subscription.

CambridgeSoft Corportation
www.cambridgesoft.com
E-mail: info@cambridgesoft.com
Monographs and retired entries are searchable by text, properties, and structures. Text searchable Organic Name Reactions and Supplementary Tables are included.

Dialog
www.dialog.com
E-mail: customer@dialog.com
Monographs are searchable by text and properties.

Knovel
www.knovel.com
E-mail: merckindex@knovel.com
Monographs and retired entries are searchable by text and properties. Text searchable Organic Name Reactions and Supplementary Tables are included.

MedicinesComplete
www.medicinescomplete.com
Email: pharmpress@rpsgb.org
Monographs and retired entries are text searchable. Text searchable Organic Name Reactions and Supplementary Tables are included. Interactive Therapeutic Category Index links to monograph data.

STN International
www.cas.org
E-mail: help@cas.org
Monographs are searchable by text and properties. CAS structures are displayed within the monographs.