Displaying 1 results of Dansyl Chloride Stable Isotopes Dansyl Chloride Stable Isotopes are a set of isotopically labeled reagents that are widely used in the field of analytical chemistry. These reagents are used to label proteins, nucleic acids, and other biomolecules for the purpose of detection, quantification, and identification. They are stable isotopes, meaning that they have the same number of protons and electrons as their non-labeled counterparts, but differ in their number of neutrons. This makes them ideal for use in mass spectrometry, where the isotopic composition of a sample can be analyzed to determine the presence and quantity of a given molecule.