← All chemicals

CAS 96-09-3

Styrene oxide

CarcinogenMutagen

Styrene oxide is a toxic, reactive liquid used to make plastics and other chemicals. It also forms when the related chemical styrene breaks down in air and in the body, so it matters for both workplaces and nearby communities [1][4].

Where It Comes From

Made as an intermediate in producing plastics/resins; forms from styrene in the environment and in people exposed to styrene [1][4].

How You Are Exposed

Breathing vapors or skin contact at work (plastics/resins, labs); lower community exposures can occur near industrial sources [2][4].

Why It Matters

Can irritate eyes, skin, and airways; high exposures may cause headache and nausea. It damages DNA; IARC classifies it as probably carcinogenic (Group 2A) and NTP lists it as reasonably anticipated to be a human carcinogen [1][2][3].

Who Is at Risk

Workers handling styrene oxide or styrene; people near facilities; pregnant workers and their developing babies may be more vulnerable based on animal data [2][4].

How to Lower Your Exposure

Use closed systems/ventilation, chemical-resistant gloves/eye protection, and wash skin promptly at work; follow exposure limits and spill procedures. Community members should follow local air advisories and reduce time near industrial emissions when alerts are issued [2][4].

References

  1. [1]IARC Monographs, Vol. 121: Styrene, Styrene-7,8-oxide, and 1,3-Butadiene (2018).
  2. [2]CDC/NIOSH Pocket Guide to Chemical Hazards: Styrene Oxide (CAS 96-09-3).
  3. [3]NTP Report on Carcinogens, 15th Ed.: Styrene-7,8-oxide.
  4. [4]WHO IPCS CICAD 26: Styrene oxide (2000).

Track your exposure to Styrene oxide

Pollution Profile maps your lifetime exposure history to EPA-tracked chemicals.

Get early access

We use cookies and analytics to understand how people use Pollution Profile and improve the experience. We never sell your data. Learn more.