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Nitrogen Dioxide (NO2)
Exposure limits for NO2
- TLV:
- 8 hr. TWA = 3 ppm
- 15 min. STEL = 5 ppm
- US OSHA PEL:
- Ceiling = 5 ppm
- US NIOSH REL:
- 15 min. STEL = 1 ppm
