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Quaternary ammonium compounds, C12-14-alkyl(carboxymethyl)dimethyl, salts with 4-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]benzenesulfonic acid (1:1), compds. with 3-(C8-18-alkylamino) related products: