Pentadiene

Piperylene

Names
IUPAC name 1,3-Pentadiene
Other names Penta-1,3-diene
Identifiers
CAS Number	504-60-9 Y
3D model (JSmol)	Interactive image
ChemSpider	56020 N
ECHA InfoCard	100.007.269
EC Number	207-995-2
PubChem CID	62204
InChI InChI=1S/C5H8/c1-3-5-4-2/h3-5H,1H2,2H3/b5-4+ N Key: PMJHHCWVYXUKFD-SNAWJCMRSA-N N InChI=1/C5H8/c1-3-5-4-2/h3-5H,1H2,2H3/b5-4+ Key: PMJHHCWVYXUKFD-SNAWJCMRBX
SMILES C/C=C/C=C
Properties
Chemical formula	C5H8
Molar mass	68.117 g/mol
Appearance	Colorless liquid
Density	0.683 g/cm3
Melting point	−87 °C (−125 °F; 186 K)
Boiling point	42 °C (108 °F; 315 K)
Hazards
R-phrases (outdated)	R11 R36 R37 R38
S-phrases (outdated)	S16 S26 S36 S37 S39
Flash point	< −30 °C (−22 °F; 243 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Piperylene is a volatile, flammable hydrocarbon consisting of a five carbon chain with two double bonds. It is obtained as a byproduct of ethylene production from crude oil, combustion of biomass, waste incineration and exhaust gases.

Piperylene is used as a monomer in the manufacture of plastics, adhesives and resins. Piperylene is colorless. Upon release into the aquatic environment it is expected to adsorb to suspended particulate matter (SPM) based on its estimated KOC value.

The alternating double and single carbon-carbon bonds form a conjugated system.