FAQs and Quick Reference Guides
Searching
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Prior Art Discovery FAQs
How does Prior Art Discovery work? This feature analyzes your input text and uses multiple AI-powered algorithm streams to find simi...
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What are AI-driven search enhancements?
Text searching reactions in CAS SciFinder has been enhanced with AI-driven query interpretation. AI, trained with CAS data, is being le...
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Can I use Greek letters in a search?
Yes. When entering your search query, the following Greek letters and their equivalents will match and return results. Notes Entering ...
Drawing Tools
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How do I perform a SciFinder structure search within ChemDraw?
You may search starting with ChemDraw version 18.2, but you must be an authenticated and authorized user of CAS SciFinder in order for ...
Proxy Connection
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Why does Search History fail to record when I connect from off campus?
When some users have been on campus making a direct connection on the campus network without use of EZproxy, search history was recorde...
Reactions
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When do multi-step or product-only reactions appear in my results?
Searching reactions by structure retrieves multistep and product-only reactions when all structure fragments have either Reactant, Rea...
Substances
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What are similarity scores?
A similarity search for substances results in a set of candidates that are most similar to your query structure, grouped by similarity ...
References
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What is AI-driven reference result summarization?
For optimized queries that have at least 5 results, an AI Summary (based on up to the top 20 results) appears at the top of the All and...
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What are the available CA Section titles?
CA data is categorized into one of the below sections: Pharmacology Mammalian Hormones Biochemical Genetics Toxicology Agrochemical Bi...
Markush
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What is Markush?
A Markush structure is a single structure used to define a set of implied structures specified on the “atom” level (methyl, phenyl) and...
Quick Reference Guides and Videos
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How-To Videos
Welcome to CAS SciFinderSubstance SearchingReaction SearchingReference SearchingPatent SearchingSequence Searching
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SciFinder Quick Reference Guides for Commercial and Academic Users
SciFinder Quick Reference Guide - Commercial Users SciFinder Quick Reference Guide - Academic Users