The latest edition of the handbook. Useful for looking of physical constants, mathematical tables, thermodynamic properties, and much more. Able to search both by document/table name or by chemical compound.
Contains MS (electron impact), FT-IR, 1H NMR, 13C NMR, Raman, and ESR spectral data. Over 34,000 compounds total. Maintained by the Japanese National Institute of Advanced Industrial Science and Technology (AIST). SDBS FAQ