H‑D‑Glu(OBzl)‑OBzl·HCl is primarily used as a protected D-glutamic acid building block for both solution-phase and Boc-based solid-phase peptide synthesis. Its dual benzyl ester protection allows selective manipulation of either carboxyl group during multi-step synthesis, and the free amine (as HCl salt) can be directly coupled after neutralization.

Benzyl ester groups in H‑D‑Glu(OBzl)‑OBzl·HCl are typically removed by catalytic hydrogenolysis using palladium on carbon (Pd/C) under hydrogen gas at atmospheric or slightly elevated pressure, or by treatment with HBr in glacial acetic acid. The choice of method depends on the sensitivity of other functional groups present in the target peptide.

H‑D‑Glu(OBzl)‑OBzl·HCl is not generally recommended for standard Fmoc/tBu SPPS because the benzyl ester protecting groups are not efficiently cleaved by the TFA-based global deprotection cocktails used in that strategy. It is best suited for Boc-based SPPS or solution-phase peptide synthesis where HF or HBr/AcOH global deprotection is employed.

The compound should be stored in a cool, dry environment, preferably at 2–8 °C, in a tightly sealed container protected from moisture and light. As a hygroscopic hydrochloride salt, exposure to ambient humidity may cause caking or degradation over time. Use of desiccants or inert gas blanketing is advisable for long-term storage.

The D-configuration at the alpha carbon makes H‑D‑Glu(OBzl)‑OBzl·HCl the enantiomer of the natural L-glutamic acid derivative. D-Amino acids incorporated into peptides confer resistance to most mammalian proteases, which are stereospecific for L-amino acid substrates. This property is exploited in the design of stable therapeutic peptides, peptidomimetics, and research probes.