There was insufficient experimental data to effectively assess the formation of 1,3-Bis(2-hydroxyethyl)urea (BHEU) at various temperatures, and it was impossible to determine this reaction's activation energy accurately. The reaction mechanisms for forming BHEU are expected to resemble those of HEEDA (reaction no. 1) closely. Therefore, Braakhuis et al. consider it reasonable to assume that the activation energies for both reactions are similar. As such, the same activation energy is applied to model the formation of BHEU.