Browse reference spectra from the USGS Spectral Library Version 7 and other curated sources. Each spectrum includes interactive plots, metadata, and downloadable data.
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| Formula | Modality | Category | Source | ||
|---|---|---|---|---|---|
| Violaceol II | C14H14O5 | Mass Spec | Environmental | MassBank | |
| Violanthrone79 SA-641790 | — | NIR | Organic | USGS | |
| Violanthrone79 SA-641790 75K | — | NIR | Organic | USGS | |
| Violanthrone79 SA-641790 85K | — | NIR | Organic | USGS | |
| Violaxanthin | C40H56O4 | Mass Spec | Chemical | MassBank | |
| Violet membrane asymmetry probe (F2N12S) (excitation) | — | Fluorescence | Fluorescent dye | FPbase | |
| Viomellein | C30H24O11 | Mass Spec | Environmental | MassBank | |
| Viridicatin | C15H11NO2 | Mass Spec | Metabolite | MassBank | |
| Viridicatol | C15H11NO3 | Mass Spec | Metabolite | MassBank | |
| Viridicatumtoxin | C30H31NO10 | Mass Spec | Metabolite | MassBank | |
| Viridiflorine | C15H27NO4 | Mass Spec | Chemical | MassBank | |
| Vitexin | C21H20O10 | Mass Spec | Natural product | MassBank | |
| Vitexin-2''-O-rhamnoside | C27H30O14 | Mass Spec | Natural product | MassBank | |
| Voacristine | C22H28N2O4 | Mass Spec | Natural product | MassBank | |
| Volinanserin | C22H28FNO3 | Mass Spec | Environmental | MassBank | |
| Vomitoxin | C15H20O6 | Mass Spec | Metabolite | MassBank | |
| Voriconazole | C16H14F3N5O | Mass Spec | Chemical | MassBank | |
| Voriconazole-N-oxide | C16H14F3N5O2 | Mass Spec | Pharmaceutical | MassBank | |
| Vorinostat | C14H20N2O3 | Mass Spec | Chemical | MassBank | |
| Vybrant DyeCycle Orange stain (emission) | — | Fluorescence | Fluorescent dye | FPbase | |
| Vybrant DyeCycle Ruby stain (emission) | — | Fluorescence | Fluorescent dye | FPbase | |
| Vybrant DyeCycle Ruby stain (excitation) | — | Fluorescence | Fluorescent dye | FPbase | |
| W3N6 | W3N6 | Raman | Inorganic | CRD Oulu | |
| W3N6 | W3N6 | FTIR | Inorganic | CRD Oulu | |
| WBr6 | WBr6 | Raman | Inorganic | CRD Oulu | |
| Walleminone | C15H24O3 | Mass Spec | Metabolite | MassBank | |
| Warfarin | C19H16O4 | Mass Spec | Chemical | MassBank | |
| Water+Montmor SWy-2+0.50g-l | — | NIR | Liquid | USGS | |
| Water+Montmor SWy-2+1.67g-l | — | NIR | Liquid | USGS | |
| Water+Montmor SWy-2+16.5g-l | — | NIR | Liquid | USGS | |
| Water+Montmor SWy-2+5.01g-l | — | NIR | Liquid | USGS | |
| Wetland YNP-WT-1 | — | NIR | Vegetation | USGS | |
| Wetland YNP-WT-2 | — | NIR | Vegetation | USGS | |
| White Crust | — | NIR | Soil | USGS | |
| WhitebarkPine YNP-WB-1 frst | — | NIR | Vegetation | USGS | |
| WhitebarkPine YNP-WB-2 frst | — | NIR | Vegetation | USGS | |
| Wighteone O-glucoside | C26H28O10 | Mass Spec | Natural product | MassBank | |
| Willow Dead FluvTailSite A | — | NIR | Vegetation | USGS | |
| Willow Willow-Leaves-1 dry | — | NIR | Vegetation | USGS | |
| Willow YNP-WI-1 | — | NIR | Vegetation | USGS | |
| Willow-Sedge-Mix YNP-WS-1 | — | NIR | Vegetation | USGS | |
| XANTHENE | C13H10O | Mass Spec | Chemical | MassBank | |
| XANTHENE-9-CARBOXYLIC ACID METHYL ESTER | C15H12O3 | Mass Spec | Chemical | MassBank | |
| XANTHENE-9-CARBOXYLIC ACID TRIMETHYLSILYLESTER | C17H18O3Si | Mass Spec | Chemical | MassBank | |
| XANTHOSINE | C10H12N4O6 | Mass Spec | Chemical | MassBank | |
| XYLENOL | C17H20O2 | Mass Spec | Natural product | MassBank | |
| Xamoterol | C16H25N3O5 | Mass Spec | Chemical | MassBank | |
| Xanthine | C5H4N4O2 | Mass Spec | Chemical | MassBank | |
| Xanthine SA-X0626 | — | NIR | Organic | USGS | |
| Xanthine SA-X0626 | — | FTIR | Organic | USGS |