4CuSO4 + N2H4•H2O + 12(NH3•H2O) → 2[Cu(NH3)2]2SO4 + N2 + 13H2O + 2(NH4)2SO4
Copper sulphate react with hydrazine hydrate and ammonium hydroxide to produce diamminecopper(I) sulfate, nitrogen, water and ammonium hydroxide. Ammonium hydroxide - concentrated solution.