Anhydrides ensure a safety and reliability of energy supply in Europe are therefore critical for the functioning of the society. Anhydrides-based epoxy-systems are critical components in electrical equipment, such as wound winding insulations, bushings and insulators, used in the EU energy grid. AJIT applied the criteria published in the European Commission’s communication on “Guiding criteria and principles for the essential use concept in EU legislation dealing with chemicals” to demonstrate the essentiality of the use of anhydrides in the context of the energy production and distribution in Europe.