Detection of impurities in dietary supplements containing L-tryptophan was written by Karakawa, Sachise;Nakayama, Akira;Ohtsuka, Naoto;Sato, Katsuma;Smriga, Miro. And the article was included in Amino Acids in 2022.Recommanded Product: 54-47-7 The following contents are mentioned in the article:
Impurities in nine dietary supplements containing L-tryptophan were evaluated using an HPLC methodol. In five tested products, the total impurities were higher than the thresholds described in the Food Chem. Codex or implemented in the EU for pharmaceutical grade L-tryptophan. In addition, liquid chromatog.-mass spectrometry was used to specifically test for the presence of 1,1-ethylidenebis-L-tryptophan (EBT). None of the tested products contained detectable amounts of EBT. High amounts of unidentified impurities in some dietary supplements point to potential health risks. This study involved multiple reactions and reactants, such as (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7Recommanded Product: 54-47-7).
(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C鈥揌 in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Recommanded Product: 54-47-7