- Search and Display Substance Information (PDF)
- Conduct a CAS Registry Number® Search (tutorial)
- Conduct a Chemical Name Search (tutorial)
- Searching Ring Systems in CAS REGISTRYSM (PDF)
- Current Awareness Alerts (SDIs) User Guide (PDF)
Structure searching
- Introduction to the STN® Drawing Tools (tutorial)
- CAS REGISTRY: Finding CAS Registry Numbers (PDF)
- Conduct EXACT and FAMILY Structure Search (tutorial)
- 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 (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
- Polymer Information on STN (PDF)
- Searching for Polymer Information on STN (PDF)
- Polymer Class Terms in REGISTRY (PDF)
- Polymer Searching Tips and Examples
- Selection of Polymer Index Names for CASM (PDF)
- Siloxanes Indexing Policy
Looking for addiitonal self-paced information on substance searching or structure drawing for New Users? View the STN Basics Interactive Tutorials.