How is 1,6-Diaminohexane Dihydrochloride (CAS: 6055-52-3) typically synthesized?

1,6-Diaminohexane dihydrochloride is typically synthesized by the chlorination of 1,6-hexanediamine. The reaction involves the addition of hydrogen chloride to 1,6-hexanediamine under alkaline conditions. The process is selective and yields a high percentage of the desired product. Catalysts such as sodium chloride or potassium chloride can be used to enhance reactivity and selectivity.