4-Amino-1-pentanol-d4 is primarily used in research and development as a labeled compound in analytical chemistry. Its deuterated structure makes it valuable as an internal standard in mass spectrometry, particularly for the quantification of similar non-deuterated compounds in complex biological matrices. This ensures accurate and reliable measurements in pharmacokinetic studies, drug metabolism research, and environmental analysis. Additionally, it serves as a building block in the synthesis of deuterated pharmaceuticals, aiding in the study of drug mechanisms and metabolic pathways. Its stable isotopic labeling minimizes interference, enhancing the precision of experimental results.