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Table 2 Exposure predictions for volatile organic compounds based on analysis of aerosols generated by volunteer vapers

From: Peering through the mist: systematic review of what the chemistry of contaminants in electronic cigarettes tells us about health risks

Compound N# Estimated concentration in personal breathing zone (ppm) Ratio of most stringent TLV (%) Reference
Calculated directly Safety factor 10
2-butanone (MEK) 3 0.04 0.02 0.2 [4]
1 0.002 0.0007 0.007 [6]
2-furaldehyde 3 0.01 0.7 7 [4]
Acetaldehyde 3 0.07 0.3 3 [4]
Acetic acid 3 0.3 3 30 [4]
Acetone 3 0.4 0.2 2 [4]
Acrolein 1 <0.001 <0.7 <7 [6]
Benzene 3 0.02 3 33 [4]
Butyl hydroxyl toluene 1 4E-05 0.0002 0.002 [6]
Isoprene 3 0.1 7 70 [4]
Limonene 3 0.009 0.03 0.3 [4]
1 2E-05 0.000001 0.00001 [6]
m,p-Xyelen 3 0.01 0.01 0.1 [4]
Phenol 3 0.01 0.3 3 [4]
Propanal 3 0.004 0.01 0.1 [4]
Toluene 3 0.01 0.07 0.7 [4]
  1. #Average is presented when N > 1.