AEX Anion-exchange resin 1 is a strong anion exchange chromatographic medium with a monodisperse polystyrene/divinylbenzene (PS-DVB) matrix and a particle size of 50 μm, featuring an ion exchange group of –CH2N+(CH3)3. It is suitable for the separation and purification of biological macromolecules such as proteins, antibodies, and viral vaccines.