octadecane

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| Name =

| ImageFile = Octadecane.svg

| ImageSize = 290

| ImageAlt = Structural formula of octadecane

| ImageFile1 = Octadecane 3D ball.png

| ImageSize1 = 290

| ImageAlt1 = Ball-and-stick model of the octadecane molecule

| PIN = Octadecane

| OtherNames =

|Section1={{Chembox Identifiers

| Abbreviations =

| CASNo = 593-45-3

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII = N102P6HAIU

| UNII_Ref = {{fdacite|correct|FDA}}

| EINECS = 209-790-3

| PubChem = 11635

| ChemSpiderID = 11145

| SMILES = C(CCCCCCCCCCCCCCCC)C

| InChI = 1/C18H38/c1-3-5-7-9-11-13-15-17-18-16-14-12-10-8-6-4-2/h3-18H2,1-2H3

| InChIKey = RZJRJXONCZWCBN-UHFFFAOYAL

| StdInChI = 1S/C18H38/c1-3-5-7-9-11-13-15-17-18-16-14-12-10-8-6-4-2/h3-18H2,1-2H3

| StdInChIKey = RZJRJXONCZWCBN-UHFFFAOYSA-N

| RTECS =

| MeSHName = C022883

| ChEBI = CHEBI:32926

| KEGG =

}}

|Section2={{Chembox Properties

| Formula = C₁₈H₃₈

| MolarMass = 254.494

| Appearance = White crystals or powder

| Odor = Odorless

| Density = 0.777 g mL⁻¹

| MeltingPtC = 28 to 30

| MeltingPt_notes =

| BoilingPtC = 317

| BoilingPt_notes =

| Solubility =

| SolubleOther =

| Solvent =

| LogP =

| VaporPressure = 1 mm Hg at 119 °C

| HenryConstant = 1.9·10⁻² atm m³ mol⁻¹ (est) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of Nov 11, 2016: http://www2.epa.gov/tsca-screening-tools

| RefractIndex = 1.4390 at 20 °C {{Cite web|url=https://www.chemicalbook.com/ChemicalProductProperty_EN_CB9853920.htm|title=Octadecane | 593-45-3}}

| AtmosphericOHRateConstant =

| pKa =

| pKb =

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|Section3={{Chembox Structure

| CrystalStruct =

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|Section4={{Chembox Thermochemistry

| DeltaHf =

| DeltaHc =

| Entropy =

| HeatCapacity =

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|Section5={{Chembox Pharmacology

| AdminRoutes =

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|Section6={{Chembox Explosive

| ShockSens =

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| REFactor =

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|Section7={{Chembox Hazards

| ExternalSDS =

| MainHazards =

| NFPA-H =

| NFPA-F =

| NFPA-R =

| NFPA-S =

| FlashPtC = 165

| AutoignitionPtC = 235

| ExploLimits =

| LD50 =

| PEL =

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|Section8={{Chembox Related

| OtherAnions =

| OtherCations =

| OtherFunction = {{Unbulleted list|Heptadecane|Nonadecane}}

| OtherFunction_label = alkanes

| OtherCompounds =

}}

}}

Octadecane is an alkane hydrocarbon with the chemical formula CH₃(CH₂)₁₆CH₃.