Where It Comes From
Produced in oil and gas refining and petrochemical plants; also present in emissions from vehicles and fuel combustion [1][3].
How You Are Exposed
Mainly by breathing outdoor air near traffic, refineries, or chemical plants; workers may be exposed during manufacturing or handling; accidental releases in confined spaces pose greatest danger [1].
Why It Matters
Short‑term high exposures can cause dizziness, headache, and suffocation by reducing oxygen; liquid can cause frostbite. Propylene is not classifiable as to carcinogenicity in humans (IARC Group 3). As a VOC, it contributes to ground‑level ozone, which harms respiratory health [1][2][3].
Who Is at Risk
Industry workers; people living or exercising near heavy traffic or industrial areas; individuals with asthma or lung disease during high‑ozone days [1][3].
How to Lower Your Exposure
Follow local ozone alerts; limit strenuous outdoor activity near traffic on high‑ozone days; avoid running engines or fuel‑burning tools indoors; at work, use ventilation, gas monitoring, and follow safety procedures [1][3].
References
- [1]CDC/NIOSH. NIOSH Pocket Guide to Chemical Hazards: Propylene (C3H6), CAS 115‑07‑1.
- [2]IARC. Monographs on the Evaluation of Carcinogenic Risks to Humans: Propylene (Group 3).
- [3]U.S. EPA. Ground‑level Ozone Basics (VOCs from vehicles/industry form ozone).