[U-Ring-13C6]-3-Chloro-2-fluoro-5-(trifluoromethyl)benzoic acid

[U-Ring-13C6]-3-Chloro-2-fluoro-5-(trifluoromethyl)benzoic acid is a complex organic compound with a molecular formula of C8H2ClF4O2. It is commonly used in chemical research and analysis as a stable isotope labeled internal standard. The stable isotope labeling technique is used in many fields including pharmaceuticals, biotechnology, and environmental analysis. It involves replacing certain atoms in a molecule with isotopes of the same element, but with different atomic masses, without changing the chemical properties of the molecule. In this case, the 13C6 isotope is used to replace the carbon atoms in the U-Ring of the molecule. The presence of the stable isotope labeled compound in a sample can be used to accurately quantify the concentration of the target compound in a complex mixture. This is done by comparing the ratio of the stable isotope labeled compound to the target compound in the sample to the known ratio in a standard sample. [U-Ring-13C6]-3-Chloro-2-fluoro-5-(trifluoromethyl)benzoic acid is a white to off-white powder that is sparingly soluble in water. It has a melting point of 200-205°C and a boiling point of 333°C. The compound is stable under normal conditions and is not considered to be hazardous to human health or the environment.