Inorganic acids are corrosive substances used in industry for chemical reactions as well as for cleaning purposes. They are used in a broad range of industries including petrochemical, fertilizer, metal finishing. Commonly used inorganic acids are sulfuric acids, hydrochloric acid, nitric acid, phosphoric acid, perchloric acid, boric acid. Exposure to small concentrations at workplace can cause respiratory tract and mucous membranes, eyes, and skin irritation, while larger concentrations can cause destruction of the same. Method NIOSH7903 is employed for determination of inorganic acids exposure
Chemical |
NIOSH Recommended Exposure Limits(mg/m3) |
Hydrobromic acid |
10 |
Hydrochloric acid |
7 |
Hydrofluoric acid |
TWA 2.5 (15 min) |
Nitric acid |
TWA 5 |
Perchloric acid |
- |
Phosphoric acid |
TWA 1 |
Sulfuric acid |
TWA 1 |
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