An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Nitric oxide - AEGL Program

Nitric oxide *     10102-43-9     (Final)
  10 min 30 min 60 min 4 hr 8 hr
ppm      
AEGL 1 NR NR NR NR NR
AEGL 2 NR NR NR NR NR
AEGL 3 NR NR NR NR NR

NR = Not recommended due to insufficient data
Short-term exposures to below 80 ppm NO should not constitute a health hazard
* AEGL values for nitrogen dioxide should be used for emergency planning.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.