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Databases for Chemists and Chemical Engineers

Chemical Abstracts

SciFinder Scholar | CAS Online | Standard Abbreviations | Index Guide | Guide to CASREACT | Structure Searching with STN Express

Structure searching in CAS Online using STN Express: An introductory workshop

Advantages and disadvantages of structure searching

  • Ask questions that are hard to ask in other ways
  • No need to know nomenclature
  • Get early access to substances before names are assigned
  • Expensive ($36–$54 per search)
  • Structures are not available in the Registry File for some compounds (e.g. compounds that have more than 254 Carbons)

Last modified: June 22, 2005

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