Threshold value of formaldehyde in our experiments is similar to that reported by
Stephens. 14) Threshold values of PAN and PBzN are slightly lower than those previously
reported.
Furthermore, threshold value of mixed gases with formaldehyde, PAN, PBzN and 0 3
Table 7. Threshold concentrations were summerized by Wilson and then seemed to be in a wide range.
Estimated eye irritation threshold values