Used primarily as a reference standard in pharmaceutical research and quality control, this compound helps in studying the degradation products of acetaminophen. It is particularly important in stability testing of formulations containing acetaminophen, where identification and quantification of dimer impurities ensure product safety and efficacy. The dimer may form under certain storage or manufacturing conditions, so its analysis supports the development of more stable drug products. It is also used in analytical method validation for HPLC and mass spectrometry techniques in regulatory submissions.