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Ammonium persulphate (APS) is the inorganic compound with the formula (NH4)2S2O8. It is a colourless (white) salt that is highly soluble in water, much more so than the related potassium salt.
A 2277 (OTTO) Ammonium persulphate, GR 99% Cas 7727-54-0 - used for separating macromolecules by size.