Browse reference spectra from the USGS Spectral Library Version 7 and other curated sources. Each spectrum includes interactive plots, metadata, and downloadable data.
Have an unknown spectrum? Match it against this entire library with HQI similarity scoring — no install, no data leaves your machine.
Identify My SampleLearn more about how spectral matching works, HQI scoring, and building a personal reference library on the Spectral Library Search page.
| Formula | Modality | Category | Source | ||
|---|---|---|---|---|---|
| 1-Methyl-2-pyrrolidone | C5H9NO | Mass Spec | Natural product | MassBank | |
| 1-Methyl-3-octylimidazolium | [C12H23N2]+ | Mass Spec | Chemical | MassBank | |
| 1-Methyl-4-(2-((1R,2R)-2-methyl-2-phenylcyclopropyl)ethynyl)benzene | C19H18 | Mass Spec | Chemical | MassBank | |
| 1-Methyl-4-(6,6,6-trifluoro-3-hexyenyl)benzene | C13H15F3 | Mass Spec | Chemical | MassBank | |
| 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine | C12H15N | Mass Spec | Natural product | MassBank | |
| 1-Methyl-5-(((1S,2R)-2-methyl-2-phenylcyclopropyl)ethynyl)-1H-indole | C21H19N | Mass Spec | Chemical | MassBank | |
| 1-Methyl-6-(methylsilyl)-1H-indole | C10H13NSi | Mass Spec | Chemical | MassBank | |
| 1-Methyladenine | C6H7N5 | Mass Spec | Metabolite | MassBank | |
| 1-Methyladenosine | C11H15N5O4 | Mass Spec | Chemical | MassBank | |
| 1-Methylbenzotriazole | C7H7N3 | Mass Spec | Environmental | MassBank | |
| 1-Methylguanine | C6H7N5O | Mass Spec | Chemical | MassBank | |
| 1-Methylhistamine | C6H11N3 | Mass Spec | Natural product | MassBank | |
| 1-Methylimidazole | C4H6N2 | Mass Spec | Chemical | MassBank | |
| 1-Methylnicotinamide | [C7H9N2O]+ | Mass Spec | Natural product | MassBank | |
| 1-Methyluric acid | C6H6N4O3 | Mass Spec | Environmental | MassBank | |
| 1-Methylxanthine | C6H6N4O2 | Mass Spec | Environmental | MassBank | |
| 1-Myristoyl-2-hydroxy-sn-glycero-3-phosphate | C17H35O7P | Mass Spec | Lipid | MassBank | |
| 1-Myristoyl-sn-glycero-3-phosphocholine | C22H46NO7P | Mass Spec | Chemical | MassBank | |
| 1-N-ALLYL-3-HYDROXY-MORPHINAN | C19H25NO | Mass Spec | Chemical | MassBank | |
| 1-N-Methyl-5-thiotetrazole | C2H4N4S | Mass Spec | Chemical | MassBank | |
| 1-N-PROPYLCYCLOHEXANE-1-OL | C9H18O | Mass Spec | Chemical | MassBank | |
| 1-NAPHTHALDEHYDE | C11H8O | Mass Spec | Chemical | MassBank | |
| 1-NAPHTHALENEACETIC ACID | C12H10O2 | Mass Spec | Chemical | MassBank | |
| 1-NAPHTHOIC ACID TRIMETHYLSILYL ESTER | C14H16O2Si | Mass Spec | Chemical | MassBank | |
| 1-NAPHTHYL ACETATE | C12H10O2 | Mass Spec | Chemical | MassBank | |
| 1-NAPHTHYL METHYLCARBAMATE | C12H11NO2 | Mass Spec | Chemical | MassBank | |
| 1-NAPHTHYL N-METHYLCARBAMATE | C12H11NO2 | Mass Spec | Chemical | MassBank | |
| 1-NAPHTHYL N-TRIMETHYLSILYL-N-METHYLCARBAMATE | C15H19NO2Si | Mass Spec | Chemical | MassBank | |
| 1-NAPHTHYLMETHYL BENZOATE | C18H14O2 | Mass Spec | Chemical | MassBank | |
| 1-NITROANTHRAQUINONE | C14H7NO4 | Mass Spec | Chemical | MassBank | |
| 1-NITRONAPHTHALENE | C10H7NO2 | Mass Spec | Chemical | MassBank | |
| 1-NITROPYRENE | C16H9NO2 | Mass Spec | Chemical | MassBank | |
| 1-NONADECANOL | C19H40O | Mass Spec | Chemical | MassBank | |
| 1-NONADECENE | C19H38 | Mass Spec | Chemical | MassBank | |
| 1-NONANOL | C9H20O | Mass Spec | Chemical | MassBank | |
| 1-NONENE | C9H18 | Mass Spec | Chemical | MassBank | |
| 1-Naphthalenesulfonic acid | C10H8O3S | Mass Spec | Chemical | MassBank | |
| 1-Naphthoic acid methyl ester | C12H10O2 | Mass Spec | Environmental | MassBank | |
| 1-Naphthol | C10H8O | Mass Spec | Pesticide | MassBank | |
| 1-Naphthol-5-sulfonic acid | C10H8O4S | Mass Spec | Environmental | MassBank | |
| 1-Naphthylamine | C10H9N | Mass Spec | Environmental | MassBank | |
| 1-Naphthylsulfonic acid | C10H8O3S | Mass Spec | Chemical | MassBank | |
| 1-O-(4-O-(4-O-(3-O-(3-O-(ALPHA-N-ACETYLGALACOSAMINYL)-BETA-N-ACETYLGALACTOSAMINYL)-ALPHA-GALACTOSYL)-BETA-GALACTOSYL)-GLUCOSYL)-N-TETRACOSANYL-4-SPHINGENINE | C76H139N3O28 | Mass Spec | Chemical | MassBank | |
| 1-O-(9-OCTADECENYL)GLYCEROL 2,3-DITRIMETHYLSILYL ETHER | C27H58O3Si2 | Mass Spec | Chemical | MassBank | |
| 1-O-1'-TETRADECENYL-2,3-DI-O-ACETYL GLYCEROL | C21H38O5 | Mass Spec | Chemical | MassBank | |
| 1-O-HEXADECYLGLYCEROL 2,3-DITRIMETHYLSILYLETHER | C25H56O3Si2 | Mass Spec | Chemical | MassBank | |
| 1-O-Hexyl-2,3,5-trimethylhydroquinone | C15H24O2 | Mass Spec | Chemical | MassBank | |
| 1-O-OCTADECENYL-2,3-DI-O-ACETYLGLYCEROL | C25H46O5 | Mass Spec | Chemical | MassBank | |
| 1-O-OCTADECYL-2,3-DI-O-ACETYLGLYCEROL | C25H48O5 | Mass Spec | Chemical | MassBank | |
| 1-O-OCTADECYLGLYCEROL 2,3-DITRIMETHYLSILYLETHER | C27H60O3Si2 | Mass Spec | Chemical | MassBank |