NIST/EPA/NIH Mass Spectral Library is the most popular library for GC/MS instruments, with 190,825 spectra presented. This software offers: * 190,825 EI Mass Spectra * 163,198 compounds, 163,195 structures * 121,112 Retention indices of 25,983 Compounds * 5,191 MSMS Spectra * Spectral search and analysis software