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SWAIN CHEMISTRY AND CHEMICAL ENGINEERING LIBRARY
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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

Guide to CASREACT

Searching by Functional Groups and Common Heterocyclic Rings | Functional Groups Available | Functional Group Class Terms | Ring Terms | Searching by CAS Registry Number

Searching by CAS Registry Number

Chemical Abstracts Service, 1993. Reproduced for educational purposes with permission from CAS, a Division of the American Chemical Society.

Each chemical substance which participates in a reaction is indexed in CASREACT.

CAS RN searching is not as precise as structure searching because you cannot designate where the reaction occurs.

You may search for a substance in any role.

Example: => s 50-00-0

Role Qualifiers for CAS Registry Numbers
Reactant /RCT
Reagent /RGT
Reactant or Reagent /RRT
Solvent /SOL
Catalyst /CAT
All but Product /NPRO
Product /PRO

Example: => s 50-00-0/RCT

The only way to search for catalysts and solvents (because structure searching is limited to Reactant, Reagent, and Product roles).

You must locate CAS RNs before you sign on to CASREACT because the CASREACT account we have does not include access to the CAS Registry File.



Last modified: June 24, 2005

   
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