Used primarily in pharmaceutical research as a metabolite of nicotine, this compound serves as a biomarker for nicotine exposure in biological samples. It is valuable in clinical and forensic toxicology for assessing tobacco use and monitoring compliance in smoking cessation programs. Due to its structural similarity to nicotine, it also supports studies on nicotine metabolism and pharmacokinetics. Additionally, it may be employed in the development and validation of analytical methods such as mass spectrometry and chromatography for accurate detection in urine, blood, or saliva.