Benzyl ε-Aminohexanoate Tosylate is an intermediate used in the synthesis of 3-[[(5-Carboxypentyl)amino]carbonyl]-3-hydroxypentanedioic Acid (C181165), which is derived from Methyl 6-Aminohexanoate Hydrochloride (M287100), which is used as a reagent to synthesize straight chain hydroxamates, compounds that act as inhibitors of Human Histone Deacetylase (HDAC) that have the potential to treat cancer. Methyl 6-aminohexanoate is also sometimes used as a spacer unit for peptide synthesis.