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. 2023 Dec 3;10(1):e23089. doi: 10.1016/j.heliyon.2023.e23089

Table 2.

Occupational hazard restrictions for components used in the production of nitric acid [23].

TLV-STEL for 15min TLV-TWA for 8hr Components
35 25 Ammonia
35 25 Nitrogen Monoxide
5 3 Nitrogen Dioxide
4 2 Nitric Acid