• 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.