Ethylene - Ethene

B.P. -104^oC
#4 most produced chemical in the US
> 50 x 10⁹ pounds per year
10% by mass of all organic chemicals manufactured in the US

Cracking at 850^o:       C₂H₆ ------->C₂H₄ + H₂

Polyethylene

2 HDPE   4 LDPE