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N,N-Diethyl-2-propyneammonium sulfate is a sulfate compound with the appearance of a transparent colourless or slightly yellow liquid, easily soluble in water. It is also an electroplating intermediate and is used as a top brightener and stronger levelling agent in nickel baths at concentrations of 5-40 ml/L.

N,N-Diethylpropargylamine sulfate(TC-DEP) is colorless to light yellow transparent liquid, which can be used as brightener and strong leveling agent.