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Ammonio Methacrylate Copolymers

Medically reviewed by Last updated on Nov 30, 2023.

Excipient (pharmacologically inactive substance)

What is it?

Ammonio methacrylate copolymers are excipients used in pharmaceutical manufacturing. Ammonio methacrylate copolymers are compounds derived from ethyl acrylate, methyl methacrylate and a low content of methacrylic acid ester with quaternary ammonium groups. They are solid substances in the form of a white powder with a faint amine-like odor. The ammonium groups are present as salts and make the polymers permeable. They are used in the manufacture of time-released products that are pH-independent in the pharmaceutical industry.


  1. Evonik Industries. Eudragit RL PO. Accessed January 10, 2014.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.