Search for Information About Substances, Reactions, References, and Suppliers
Enter a text query or click the Draw button to add a structure query.
Note: If your query consists of a structure and text, the matching results (based on the search type selected in CAS Draw) must contain the text terms and the structure.
Prior Art Discovery
This feature analyzes the title, abstract, claims, and CAS indexing for your patent and uses multiple AI-powered algorithm streams to find similar relevant patents and non-patent literature. These documents will all have priority dates before that of your target patent, representing the state of the art before your patent established its priority.
Patent Markush
Use a Patent Markush search to find structures (including generic structures) matching your query within patent references.
Advanced Search
Search for substances and references using data fields and operators to create a focused query. Fields available include:
- Substances:
- Molecular Formula
- Substance RN
- Component RN
- Chemical Name
- References:
- Author/Inventor Name
- Abstract/Keywords
- Title
- Concept
Search CAS Lexicon
Searching the CAS Lexicon helps you find the CA indexing terms for concepts, chemical classes, and taxonomic vocabulary. By viewing and selecting CA Concepts and other related Concepts, you can pinpoint your reference search.
Retrosynthetic Analysis
Perform a retrosynthetic analysis on a drawn or imported target structure using the Retrosynthesis search type or substance window.
Search CAS Sequences
Find BLAST, CDR, and Motif biosequences by protein/nucleotide string or a.txt/.fasta file.
Recent Searches
When a search is completed, the query is displayed in the Recent Search History section of the Home page. Use the options to Edit the query or Rerun Search.
Click View All Search History to open the Search History page.