decoppering agents

decoppering agents

drugs which promote excretion of copper; includes d-penicillamine, trientine (2,2,2-tetramine) and 2,3,2-tetramine.
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However, post-war powder manufacturers apparently didn't see copper-fouling as a concern for civilian shooters, who unlike soldiers had plenty of spare time to clean barrels, so most new powders didn't contain decoppering agents.