2-(5-tert-Butyl-2-hydroxyphenyl)benzotriazole-d9 (Major)

2-(5-tert-Butyl-2-hydroxyphenyl)benzotriazole-d9 (Major) is a deuterated version of the popular UV absorber, 2-(5-tert-Butyl-2-hydroxyphenyl)benzotriazole (also known as Tinuvin 327). This compound is used as an ultraviolet light absorber in a wide range of applications such as plastics, coatings, adhesives, and fibers to protect against photo-degradation and prevent discoloration, cracking, and other forms of damage caused by exposure to UV radiation. The deuterated version of this compound, Major, is a labeled compound that is used in analytical chemistry to study the metabolism and pharmacokinetics of the parent compound. The addition of deuterium atoms in the compound's structure allows for the differentiation of Major from the unlabeled compound during analysis, making it a useful tool for drug development and metabolism studies. The chemical formula of Major is C21H14D9N3O, with a molecular weight of 329.47 g/mol. It has a melting point range of 146-150 °C and is soluble in common organic solvents such as methanol, ethanol, acetone, and chloroform. Overall, the use of 2-(5-tert-Butyl-2-hydroxyphenyl)benzotriazole-d9 (Major) is essential in both commercial and analytical settings, providing protection against UV radiation and aiding in the study of the parent compound's metabolism and pharmacokinetics.