Acetone was used as the vehicle to apply the pyrethroids to the
skin in this study. Acetone is a good choice to use as a vehicle in
dermal absorption studies because of its volatility and many
chemicals are soluble in it. Typically, the volume of acetone used in
dermal absorption studies ranges from 5–10 μl/cm2, although a wider
range has been used (5–36 μl/cm2)