Spin based electronics has been predicted to have a huge impact on advanced data storage, microelectronics, automotive sensors, quantum computing and biomedical applications. The relatively new field of organic spintronics is especially promising for future applications, thanks to the extremely long spin relaxation times, the large flexibility and the low manufacturing costs of organic semiconductors. However, a deeper understanding of the fundamental mechanisms behind electron spin relaxation (eSR) in organic molecules is required. The underlying mechanisms driving eSR in these materials are currently a hotly debated topic. We plan on measuring the magnetic field dependence of the eSR and identify the relative importance of the spin orbit and hyperfine interactions in driving eSR.