Dicyclopentadiene

Made during petroleum “cracking” and used to produce unsaturated polyester and hydrocarbon resins, EPDM rubber, and some inks/adhesives; released mainly from industrial processes [1][2].

Breathing air where DCPD is produced or used (e.g., fiberglass/resin work), near spills or waste sites; skin contact with liquid; less often by drinking contaminated water [1][2][3].

Short‑term exposure can cause eye, nose, and throat irritation, headache, dizziness, and nausea; very high levels may cause coughing and drowsiness; repeated high exposure harmed liver and kidneys in animals; cancer data are inadequate/not classifiable by EPA [1][2][3].

Workers in resin/plastics or boat‑building shops and people near petrochemical plants or waste sites, especially without good ventilation/PPE [1][3].

Use products outdoors or with local exhaust, avoid skin contact, follow labels; workers should use gloves/eye protection and NIOSH‑approved respirators when needed; report odors/spills to local authorities [1][3].