Abstract
When flavin adenine dinucleotide was heated at 100℃ in its aqueous solution, it was decomposed to so-called fourth flavin compound (riboflavin-4'5'-cyclic phosphate). This decomposition was inhibited by the coexistence of phenol, p-cresol, guaiacol, phloroglucinol, sodium salicylate or sodium p-aminosalicylate, but not by that of aniline, benzyl alcohol or sodium benzoate. The decomposition was also found to be inhibited by the presence of sodium phosphate or borate.
