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Propylene - Wikipedia
Propylene | Gas, Petroleum, & Glycol | Britannica
Propylene - Chemical Safety Facts
Propylene | Formula, Properties & Application
Propylene - Wikiwand
Propylene glycol | Description, Formula, Production, & Uses
Propylene Definition & Meaning - Merriam-Webster
Propylene | Encyclopedia.com
Propylene Formula & Structure - Purdue University
Propene - NIST Chemistry WebBook