Table 4, Physiological Response
to Various Concentrations of Sulfur Dioxide

 

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Physiological Response Sulfur Dioxide in PPM of Air
Least detectable odor 3 to 5
Least amount causing immed. irritation to the eyes 20
Least amount causing immed. irritation to the throatat 8 to 12
Least amount causing coughing 20
Max. concentration allowable for prolonged exposuresure 10
Max. concentration allowable for short exposure 50 to 100
Dangerous for even short exposure 400 to 500