3-Ethylpentane

3-Ethylpentane
	Skeletal formula of 3-ethylpentane
Ball and stick model of 3-ethylpentane	Spacefill model of 3-ethylpentane
Names
	Preferred IUPAC name 3-Ethylpentane
Identifiers
CAS Number	617-78-7 ;
3D model (JSmol)	Interactive image ;
ChEBI	CHEBI:165737 ;
ChemSpider	11551 ;
ECHA InfoCard	100.009.573
EC Number	210-529-0;
PubChem CID	12048 ;
UNII	KN826QW56K ;
CompTox Dashboard (EPA)	DTXSID8073211 ;
	InChI InChI=1S/C7H16/c1-4-7(5-2)6-3/h7H,4-6H2,1-3H3 Key: AORMDLNPRGXHHL-UHFFFAOYSA-N ;
	SMILES CCC(CC)CC;
Properties
Chemical formula	C7H16
Molar mass	100.205 g·mol−1
Appearance	Colourless liquid
Odor	Odourless
Density	693.77 mg mL−1
Melting point	−119.0 to −118.5 °C; −182.1 to −181.4 °F; 154.2 to 154.6 K
Boiling point	93.3 to 93.7 °C; 199.8 to 200.6 °F; 366.4 to 366.8 K
Henry's law; constant (kH)	3.9 nmol Pa−1 kg−1
Thermochemistry
Heat capacity (C)	219.58 J K−1 mol−1
Std molar; entropy (S⦵298)	314.55 J K−1 mol−1
Std enthalpy of; formation (ΔfH⦵298)	−226.2–−223.8 kJ mol−1
Std enthalpy of; combustion (ΔcH⦵298)	−4.8174–−4.8152 MJ mol−1
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H225, H304, H315, H336, H410
Related compounds
Related alkanes	Isopentane ; 2-Methylpentane ; 3-Methylpentane ; 2-Methylhexane ; 3-Methylhexane ;
Related compounds	2-Ethyl-1-butanol ; Valnoctamide ;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Last updated July 18, 2025

3-Ethylpentane (C₇H₁₆) is a branched saturated hydrocarbon. It is an alkane, and one of the many structural isomers of heptane, consisting of a five carbon chain with a two carbon branch at the middle carbon.

An example of an alcohol derived from 3-ethylpentane is the tertiary alcohol 3-ethylpentan-3-ol.^[3]

References

↑ "3-ETHYLPENTANE - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 10 March 2020.
1 2 Recordof 3-Ethylpentane in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 10 March 2020.
↑ Ritchie, R and Gent, D: OCR Chemistry AS, page 151. Heinemann, 2007.

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[1] "3-ETHYLPENTANE - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 10 March 2020.

[GESTIS-2] 1 2 Recordof 3-Ethylpentane in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 10 March 2020.

[3] Ritchie, R and Gent, D: OCR Chemistry AS, page 151. Heinemann, 2007.

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