Wiley Registry of Mass Spectral Data, 12th Edition

Technique: GC-MS Spectral Databases

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Confident compound identification with the most comprehensive GC-MS library

The field-tested Wiley Registry® of Mass Spectral Data, 12th Edition is the largest mass spectral library commercially available, providing over double the compound coverage of our competitors. Applications include untargeted GC-MS screening and accurate mass workflows with MS-TOF instruments.

Experience improved spectral search performance with the 12th Edition. The latest version was extensively validated to sequester and remove suspect spectra from the main library. The new edition also introduces the inclusion of chemical classifications, calculated Kovats retention indices, and splash IDs.

The Wiley Registry of Mass Spectral Data, 12th Edition provides researchers the most assurance that their untargeted spectral search is the broadest available. 

Now with 40K+ Bonus Spectra exclusively added only in the KnowItAll Subscription

  • Stay on the cutting edge of new data by having early access via subscription.
  • And by adding a subscription to the KnowItAll software, you have one of the most powerful tools for automated non-targeted GC-MS analysis (deconvolution + library search), MS Adaptive Search, and more.

Library Specifications

See comparison between releases:

 WR SubscriptionWR12WR11WR10WR9NIST17NIST14
Searchable Structures824,693785,061741,255684,721565,106306,662276,248
Unique Compounds 694,428668,452632,511583,781476,553262,158237,409


See supported instrument file formats.

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Compound Coverage

 Compound coverage can be searched at www.compoundsearch.com.