Leuprolide impurities are detected and characterized using various analytical techniques such as high-performance liquid chromatography (HPLC), liquid chromatography mass spectrometry (LC-MS), and infrared (IR) spectroscopy.

The factors that can influence the formation of Leuprolide impurities during its synthesis include the quality and purity of starting materials, reaction conditions, catalysts and reagents used, purification methods, and storage conditions.

The synthesis of Leuprolide impurities typically involves solid-phase peptide synthesis techniques, which include protecting and activating amino acid building blocks, assembly of the peptide chain, deprotection and purification of the peptide, and characterization and analysis of the final product

The storage conditions for Leuprolide impurities may vary depending on the specific impurity and its stability. In general, it is recommended to store Leuprolide impurities at temperatures between 2-8°C in a dry and well-ventilated area to prevent degradation and maintain their stability. However, some impurities may require specific storage conditions such as refrigeration or freezing, to ensure their stability over an extended period.