This site provides information and access to NIST mass spectral data products. A variety of data products are available, including EI and tandem MS libraries (small molecule and peptide), a GC retention index collection as well as certain freely available, specialized spectral libraries. Freely available data analysis tools include AMDIS (Automated Mass Spectral Deconvolution and Identification System for GC/MS), the Mass Spectrum Interpreter (connects chemical structures with mass spectra), and the Mass Spectral Digitizer Program. Also available is a fully functional, version of NIST MS Search Program v.2.3 with a small demonstration library.

Libraries

• Just Released - 2026 Versions of our EI, Tandem & RI Libraries & Software
  • Electron Ionization (EI), Tandem (MS/MS)

• Distributors: NIST Databases are available only through Distributors
• NIST Libraries and software - For Users of NIST Libraries and Software
• NIST Peptide MS Libraries – Nearly 3.8 million MS/MS Spectra for multiple biological species
• NIST Tandem MS Library- Library of tandem mass spectra for both ion-trap and variable-energy collision cell fragmentation
• NIST GC Method / Retention Index MS Library- Extensive collection of GC retention indices with method information
• On-Line Milk SRM/D 1953 Tandem MS library - Web version of the SRM/D 1953 Library.
• On-Line Glycan MS/MS Library - Web version of the NIST Glycan Mass Spectral Reference Library
• EPA Tandem Mass Spectrometry Library – Starter library of environmentally relevant compounds
• DART Forensics Library – A library of in-source fragmentation spectra of DART-generated ions
• Glycan MS/MS Library – A library of 209 glycans (includes MS Search software and 16,421 glycan spectra extracted from the NIST Tandem Library)
• ARUS - Annotated Recurrent Unidentified Spectra (ARUS ) Libraries for Analysis
• NIST-Polymer Pyrolysis Search – An R shiny app and library to search pyrolysis GCMS data

Tools

• Mass Spectrum Interpreter 2023 Release (v.3.4.5). Information and downloads for version 3.4 of this program which connects mass spectral peaks to their probable chemical structure origin (EI and MS/MS, both nominal and accurate mass).
• NIST MS Software and Data - updates, demo, documentation, MSPepSearch, Lib2NIST, RUS libraries and support programs.
• AMDIS – computer program that extracts spectra for individual components in a GC/MS data file (Instructions for using AMDIS with MS Search – 11-25-2019 Release
• Mass Spectrum Digitizer Program – a tutorial on how to use the program (includes program download) that allows the digitization of graphical spectra
• The NIST Glyco Mass Calculator - a tool to aid in the analysis of glycoforms
• DIMEDR - A Novel Algorithm for Agglomerating Incongruent LC-MS Metabolomics Datasets.
• MS_Piano (New, 2021) - A new software tool for annotating peaks in collision induced dissociation (CID) tandem mass spectra of peptides and N-glycopeptides.

Other Products and Services

• Where to Get NIST Databases. Databases are available only through Distributors
• Mass Spectrometry Data Center – NIST home page of the group responsible for this site
• NIST Chemistry WebBook – site with a diverse collection of data including electron ionization (EI) mass spectra

Interlaboratory Study

• Glycans from IgG