Notes: Ethylene glycol monododecyl ether is a nonionic surfactant with a critical micelle concentration (CMC) of 27.5 µM at 25°C.{65313} It enhances the transdermal permeation of the antiemetic ondansetron across isolated porcine skin when used at a concentration of 160 mM, however, it decreases the viability of human epidermal keratinocytes and human dermal fibroblasts when used at a concentration of 160 µM.{65314}