Isoprene

Isoprene
Names
	IUPAC name Isoprene
	Preferred IUPAC name 2-Methylbuta-1,3-diene
	Other names 2-Methyl-1,3-butadiene
Identifiers
CAS Number	78-79-5 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:35194 ;
ChemSpider	6309 ;
ECHA InfoCard	100.001.040
KEGG	C16521 ;
PubChem CID	6557;
UNII	0A62964IBU ;
CompTox Dashboard (EPA)	DTXSID2020761 ;
	InChI InChI=1S/C5H8/c1-4-5(2)3/h4H,1-2H2,3H3 Key: RRHGJUQNOFWUDK-UHFFFAOYSA-N ; InChI=1/C5H8/c1-4-5(2)3/h4H,1-2H2,3H3 Key: RRHGJUQNOFWUDK-UHFFFAOYAS;
	SMILES CC(=C)C=C;
Properties
Chemical formula	C5H8
Molar mass	68.12 g/mol
Density	0.681 g/cm3
Melting point	−143.95 °C (−227.11 °F; 129.20 K)
Boiling point	34.067 °C (93.321 °F; 307.217 K)
	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

Isoprene, or 2-methyl-1,3-butadiene, is a common volatile organic compound with the formula CH₂=C(CH₃)−CH=CH₂. In its pure form it is a colorless volatile liquid. It is produced by many plants and animals (including humans) and its polymers are the main component of natural rubber. C. G. Williams named the compound in 1860 after obtaining it from the pyrolysis of natural rubber; he correctly deduced the empirical formula C₅H₈.

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