Isopropyl glycidyl ether (IPGE) is a member of the large glycidyl ether family frequently used as a reactive diluent during the epoxy resin manufacturing process. Although the toxicity induced by this type of chemical has been investigated in many studies of different aspects (acute, subchronic, genotoxic, reproduction, etc.), there is still little known about their toxicokinetics. To gain information about the attainable systemic concentration, a liquid chromatography─tandem mass spectrometry (LC-MS/MS) method was developed and validated for the quantification of IPGE in rat plasma using its structural analogue