Description
Epitalon Stability & Purity Statement
Epitalon is a highly studied tetrapeptide that contains aspartic acid residues known to undergo a natural chemical rearrangement called aspartimide formation. This process can occur during peptide synthesis and may continue gradually during storage due to the inherent structure of the molecule.
Because this rearrangement is intrinsic to Epitalon’s chemistry and unavoidable even under optimal manufacturing conditions, industry-standard purity specifications for Epitalon are set at >90% rather than the higher thresholds applied to more chemically stable peptides. The resulting byproducts are closely related structural variants of the same peptide and do not represent contamination or manufacturing defects.
Due to Epitalon’s small size and high polarity, Hydrophilic Interaction Liquid Chromatography (HILIC) is required for accurate analytical separation and purity verification. Conventional reverse-phase HPLC methods are insufficient for reliable retention and resolution of this compound.
This analytical approach ensures accurate characterization, transparency, and consistency in quality reporting for this uniquely sensitive peptide.