Non-targeted identification of unknown chemical hazardous substances in infant teether toys by gas chromatography-Orbitrap high resolution mass spectrometry was written by Liu, Yahui;Tong, Lili;Si, Nianpeng;Xing, Jiangtao;Zhang, Qing;Ma, Qiang;Lv, Qing. And the article was included in Ecotoxicology and Environmental Safety in 2021.Reference of 106-79-6 This article mentions the following:
Chem. hazardous substances in teethers may migrate into infant’s body through oral exposure, resulting in a potential health risk. In recent years, researchers have performed a series of studies for detecting target chems. in teethers and other toys, but the presence of unknown chems. has not been systematically investigated yet. This paper reports the non-targeted identification of unknown chem. hazards that may have migrated from teethers to infants based on gas chromatog.-Orbitrap high resolution mass spectrometry. In view of the difficulties that may be encountered in the qual. anal. of substances, several typical cases and the corresponding reliable solutions are given from the perspective of comprehensive score and retention index, isotope-aided qual. anal., chem. ionization identification formula, and fragment ion detail comparison for distinguishing isomers. Finally, 28 substances are identified in 10 teether samples. Among them, phenol, N-methylaniline, 1,6-dioxacyclododecane-7,12-dione and cyclohexanone have higher detection rates. This study not only has valuable reference for the identification of unknown substances, but also has pos. guiding role in monitoring potential chem. hazards in toys and promoting the safety of products. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Reference of 106-79-6).
Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Reference of 106-79-6
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics