On May 15, 2006, Li, Na; Zou, Jiankai published an article.SDS of cas: 34413-35-9 The title of the article was Determination of impurities in industrial caprolactam produced from toluene by SPME and GC-MS. And the article contained the following:
Solid-phase microextraction (SPME) in combination with gas chromatog.-mass spectrometry (GC-MS) was applied to study the impurities in industrial caprolactam produced from toluene. Various nitriles, lactones, amides, and alcs. were detected to be the main impurities in caprolactam products. Trace amounts of heterocyclic compounds, which had great effects on the quality of caprolactam, were also successfully detected. Those were pyrrole, 2-ethyl-3-Me pyrazine, 5,6,7,8-tetrahydroquinoxaline, quinoxaline, 2,3-di-Me quinoxaline, 2-pyridinamide, etc. The effects of some impurities on caprolactam quality and the polymerization of caprolactam as well as the possible origin of the main impurities are also discussed. This could be of great importance to the industrial purity control of caprolactam. The experimental process involved the reaction of 5,6,7,8-Tetrahydroquinoxaline(cas: 34413-35-9).SDS of cas: 34413-35-9
The Article related to caprolactam impurity analysis solid phase microextraction gc ms, Organic Analytical Chemistry: Determinations and other aspects.SDS of cas: 34413-35-9
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider