Plastic additives in ambient fine particulate matter in the Pearl River Delta, China: High-throughput characterization and health implications was written by Liu, Xiaotu;Zeng, Xiaowen;Dong, Guanghui;Venier, Marta;Xie, Qitong;Yang, Mo;Wu, Qizhen;Zhao, Fanrong;Chen, Da. And the article was included in Environmental Science & Technology in 2021.Computed Properties of C20H26O4 This article mentions the following:
Elucidation of the chem. components of airborne fine particulate matter (PM2.5) facilitates the characterization of atm. contamination sources and associated human exposure risks. In the present study, we employed a high-throughput anal. approach to investigate the abundance and distribution of 163 plastic additives in ambient PM2.5 collected from 94 different sites across the Pearl River Delta region, China. These chems. are from six categories, including organophosphate esters (OPEs), phthalate esters (PAEs), PAE replacements, bisphenol analogs, UV stabilizers, and antioxidants. Ninety-three of them exhibited a detection frequency greater than 50% in PM2.5, while the combined concentrations of target plastic additives ranged from 610 to 49,400娓璯/g (median: 3500娓璯/g) across sites. By category, concentrations of PAEs (median: 2710娓璯/g) were one to three orders of magnitude greater than those of other groups, followed by PAE replacements (540娓璯/g) and OPEs (76.2娓璯/g). Chem.-dependent exposure risks to PM2.5-bound plastic additives were characterized via the estimated daily intake and hazard quotient (HQ) approaches, which resulted in two different risk prioritization systems. Although the HQ approach suggested no or very low health concerns when considering individual chems., the complexity of co-concurrent chems. in PM2.5 raises the concern on potential health risks from exposure to airborne particles and a cocktail of chem. components. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Computed Properties of C20H26O4).
Dicyclohexyl phthalate (cas: 84-61-7) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Computed Properties of C20H26O4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics