BIS(2-ETHOXYETHYL) PHTHALATE-3,4,5,6-D4

This compound is a deuterium-labeled analytical standard, specifically the tetradeuterated form of bis(2-ethoxyethyl) phthalate, where four aromatic hydrogen atoms are replaced with deuterium. It is primarily used as an internal standard or reference material in analytical chemistry, particularly in mass spectrometry and chromatography, to improve the accuracy of quantification by accounting for matrix effects and instrument variability.