The reference materials listed below provide information about features and search techniques for individual databases on STN.

For resources specific to various types of searches (e.g., bibliographic searching, substance searching. patent searching) please see the STN Training pages.

For more information on each STN database, please refer to the Database Summary Sheets.

CA^SM/CAplus^SM

• CAS Coverage of Prophetic Substances
• CA Sections
• CA Section Thesaurus (PDF)
• CAS Coverage of Patents
• CAS Roles in CA/CAplus (PDF)
• CAS Standard Abbreviations
• CASLINK for One-step Structure Searching in CAS REGISTRY^SM, MARPAT^® and CAplus (PDF)

CAS REGISTRY

• A Guide to Adding Screens in STN Structure Searching (PDF)
• Basic Name Segment Dictionary (PDF)
• CAS REGISTRY: Finding CAS Registry Numbers (PDF)
• CAS REGISTRY: Stereoisomer Searching (PDF)
• CASLINK for One-step Structure Searching in CAS REGISTRY, MARPAT and CAplus (PDF)
• Names of Trans-Fermium Elements 101-110
• Naming and Indexing of Chemical Substances for Chemical Abstracts™ (PDF)
  • Nomenclature Changes for CA Index Names (PDF)
• Polymer Class Terms in the REGISTRY File (PDF)
• Property data documentation
  • Definitions of Properties with Searchable Data in REGISTRY (PDF)
  • Property Search Fields in CAS REGISTRY (PDF)
  • Sources of Property Data in REGISTRY (PDF)
  • STN Units System
  • Tagged Experimental Properties in REGISTRY (PDF)
• Searching Coordination Compounds (PDF)
• Searching for Polymer Information on STN (PDF)
• Searching Ring Systems in CAS REGISTRY (PDF)
• Sequence documentation
  • Blocking Groups and Annotations for Sequences (PDF)
  • CAS REGISTRY: BLAST Similarity Searching via STN Express^® (PDF)
  • CAS REGISTRY: Exact and Pattern Searching of Nucleic Acid Sequences (PDF)
  • CAS REGISTRY: Exact and Pattern Searching of Protein Sequences (PDF)
  • Motif Sequence Searching (PDF)
• STN Screen Dictionary for Structure Searching (PDF)

CASREACT^®

• CASREACT User Guide (PDF)
• Getting Started in CASREACT (PDF)

EMBASE

• Emtree Release Notes - February 2019 (PDF)
• Emtree Updates - May 2019 (PDF)

IFIALL

• Getting the Most Out of IFIALL Databases on STN (PDF)

MARPAT

• CASLINK for One-step Structure Searching in CAS REGISTRY, MARPAT and CAplus (PDF)
• MARPAT User Guide (PDF)

NAPRALERT

• NAPRALERT Classification Codes (PDF)

RTECS^® (Registry of Toxic Effects of Chemical Substances)

• Comprehensive Guide to the RTECS (PDF)

SciSearch

• Citation Searching in SciSearch (PDF)