Substance and sequence searching on STN
- Search and Display Substance Information (PDF)
 - Searching Ring Systems in CAS REGISTRY℠ (PDF)
 - Current Awareness Alerts (SDIs) User Guide (PDF)
 
Structure searching
- CAS REGISTRY: Finding CAS Registry Numbers (PDF)
 - CAS REGISTRY: Stereoisomer Searching (PDF)
 - Searching Coordination Compounds (PDF)
 - CASLINK for One-step Structure Searching in CAS REGISTRY, MARPAT® and CAplus (PDF)
 - A Guide to Adding Screens in STN Structure Searching (PDF)
 - STN Screen Dictionary for Structure Searching (PDF)
 
Sequence searching
- CAS REGISTRY: Exact and Pattern Searching of Protein Sequences (PDF)
 - CAS REGISTRY: Exact and Pattern Searching of Nucleic Acid Sequences (PDF)
 - Motif Sequence Searching in STNext (PDF)
 - Motif Sequence Searching in STN (PDF)
 - CAS REGISTRY: BLAST Similarity Searching via STN Express® (PDF)
 - Blocking Groups and Annotations for Sequences (PDF)
 
Searching for property data
- Sources of Property Data in REGISTRY (PDF)
 - Tagged Experimental Properties in REGISTRY (PDF)
 - Definitions of Properties with Searchable Data in REGISTRY (PDF)
 - Property Search Fields in CAS REGISTRY (PDF)
 - STN Units System
 
Searching for polymers
*Content and features/functionality may vary based upon product license.