Octadecanal
{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 424758628
| Name = Octadecanal
| ImageFile = Octadecanal.png
| PIN = Octadecanal
| OtherNames = Octadecanaldehyde; n-Octadecanal; Octodecane aldehyde; Octodecyl aldehyde; Stearyl aldehyde; Stearaldehyde
|Section1={{Chembox Identifiers
| SMILES = CCCCCCCCCCCCCCCCCC=O
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 638-66-4
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = PH4GZ7JT4C
| PubChem = 12533
| EINECS = 211-346-9
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
| ChemSpiderID = 12016
| InChI = 1/C18H36O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19/h18H,2-17H2,1H3
| InChIKey = FWWQKRXKHIRPJY-UHFFFAOYAM
| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/C18H36O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19/h18H,2-17H2,1H3
| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
| StdInChIKey = FWWQKRXKHIRPJY-UHFFFAOYSA-N
}}
|Section2={{Chembox Properties
| C=18 | H=36 | O=1
| Density = 0.831 g/cm3, liquid
| Solubility = insoluble
| MeltingPtC = 38
| BoilingPtC = 320
}}
}}
Octodecanal is a long-chain aldehyde, with the chemical formula C18H36O (also known as stearyl aldehyde).[http://www.thegoodscentscompany.com/data/rw1419411.html stearyl aldehyde] Octadecanal is used by several species of insect as a pheromone.[http://www.nysaes.cornell.edu/pheronet/cpds/18al.html Octadecanal]