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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Decanal is an organic compound with the chemical formula C9H19CHO. It is the simplest ten-carbon aldehyde. Decanal occurs naturally and is used in fragrances and flavoring. Decanal occurs in nature and is an important component in citrus along with octanal, citral, and sinensal. Decanal is also an important component of buckwheat odour.
Decanal can be prepared by oxidation of the related alcohol decanol. 
- Rychlik, Schieberle & Grosch Compilation of Odor Thresholds, Odor Qualities and Retention Indices of Key Food Odorants, Lichtenbergstraße, Germany, 1998.
- Janes D, Kantar D, Kreft S, Prosen H (2008). "Identification of buckwheat (Fagopyrum esculentum Moench) aroma compounds with GC-MS". Food Chemistry 112: 120. doi:10.1016/j.foodchem.2008.05.048.
- R. W. Ratcliffe (1988), "Oxidation with the Chromium Trioxide-Pridine Complex Prepared in situ: 1- Decanal", Org. Synth.; Coll. Vol. 6: 373
- Safety (MSDS) data for n-decanal