Sources/Uses
"Polyaminopolycarboxlic acids; ampholyte (buffer) system used for isoelectric focusing." [ChemIDplus] General Electric (GE) stopped producing Ampholine because of explosion risk during polyamine synthesis; "Ampholine carrier ampholytes are used in both analytical and preparative isoelectric focusing. They consist of numerous polyamino-polycarboxylic acids of low molecular weight and excellent buffering capacity." [gelifesciences.com]