Ozonation treatment increases chlorophenylacetonitrile formation in downstream chlorination or chloramination was written by Zhang, Di;Bond, Tom;Li, Mingli;Dong, Shengkun;Pan, Yang;Du, Erdeng;Xiao, Rong;Chu, Wenhai. And the article was included in Environmental Science & Technology in 2021.HPLC of Formula: 3218-45-9 This article mentions the following:
Chlorophenylacetonitriles (CPANs) are an emerging group of aromatic nitrogenous disinfection byproducts (DBPs). However, their dominant precursors and formation pathways remain unclear, which hinders the further development of effective control strategies. For the first time, CPAN precursors were screened by conducting formation potential (FP) tests on real water samples from six drinking water treatment plants (DWTPs). The average overall removal of CPAN precursors across all six DWTPs was only 10%. Moreover, ozonation increased CPAN precursors by 140% on average Fluorescence spectroscopy showed a dramatic reduction in aromatic proteins, tyrosine-like proteins, and tryptophan-like proteins following ozonation. Low-apparent-mol.-weight (AMW) (<1 kDa) substances were correlated with the CPAN FP in these samples. We therefore hypothesized that protein fragments with low AMW, such as amino acids, are important CPAN precursors during downstream chlor(am)ination. Two aromatic free amino acids, tyrosine and tryptophan, were selected to investigate the formation of CPANs during chlor(am)ination. Both amino acids were found to act as CPAN precursors for the first time. CPAN formation pathways from these model precursors were proposed based on the frontier MO theory and intermediate products identified using high-resolution mass spectrometry. This study provides a powerful theor. foundation for controlling CPAN formation in drinking water. In the experiment, the researchers used many compounds, for example, 2-(2,3-Dichlorophenyl)acetonitrile (cas: 3218-45-9HPLC of Formula: 3218-45-9).
2-(2,3-Dichlorophenyl)acetonitrile (cas: 3218-45-9) belongs to nitriles. The electronic structure of nitriles is very similar to that of an alkyne with the main difference being the presence of a set of lone pair electrons on the nitrogen. Industrially, the main methods for producing nitriles are ammoxidation and hydrocyanation. Both routes are green in the sense that they do not generate stoichiometric amounts of salts.HPLC of Formula: 3218-45-9
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts