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  1. Propylene - Wikipedia

  2. Propylene - Chemical Safety Facts

  3. Propylene | CH2CHCH3 | CID 8252 - PubChem

  4. Propylene | Gas, Petroleum, & Glycol | Britannica

  5. PROPYLENE | CAMEO Chemicals | NOAA

  6. Propene - NIST Chemistry WebBook

  7. Propylene - Properties - Matmake

  8. Propene (Propylene) - Essential Chemical Industry

  9. Propylene - Some Industrial Chemicals - NCBI Bookshelf

  10. What is Propylene? (with pictures) - AllTheScience