Isotopomer, a term commonly used in chemistry, refers to isotopic forms of molecules that differ only in the distribution of isotopes within their structure. There are different synonyms used to refer to isotopomers, such as isotopic isomer, isotopic variant, isotopic analog, or isotopic homolog. These terms are used interchangeably to describe the same phenomenon. Isotopomers find applications in a wide range of fields including biotechnology, isotope geochemistry, metabolic studies, and pharmaceutical industry. The ability to distinguish isotopomers helps in understanding molecular processes and interactions where isotopic labeling is used as a tool for analysis. Therefore, isotopic isomers or isotopomers are important in various scientific disciplines.