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I need to prepare an anionic surfactant from a treatment of cetyl alcohol (hexadecanol) and $\ce{H2SO4}$, and then neutralize it using $\ce{NaOH}$ or $\ce{NH3}$; but sodium hexadecyl sulfate has a standard Krafft temperature of around 45 degrees Celsius, which is too high for our purposes.

Is it possible to reduce the Krafft temperature to room temperature by adding electrolytes, solvents or modifying counter-ions?

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