Pinpoint chemical substances
Enhance your research activities with access to a comprehensive, accurate source for chemical substances.
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Make CAS SciFinder your one true authoritative source
You need the most current and accurate substance and reaction information to quickly and confidently inform your critical research activities with key insights.
Search for substances sourced globally
With CAS SciFinder, you can access the world’s most trusted and authoritative substance resource, CAS REGISTRY®.
Through the efforts of a global network of scientists, CAS aggregates, indexes, and annotates the world’s scientific, scholarly journals, patents, dissertations, and seminal reference works every day to make the information fully discoverable within CAS SciFinder.
Search using drawn structures or substance name/number
CAS SciFinder is your one true source for authoritatively identifying a chemical substance and its related chemical structures, chemical names, regulatory information, and properties, including the CAS Registry Number®.
"Without CAS SciFinder, I would not have been able to design, prepare, and characterize a series of novel building blocks used in the synthesis of new polysiloxanes, resulting in subsequent patents."