Canosa, P.; Rodriguez, I.; Rubi, E.; Negreira, N.; Cela, R. published the artcile< Formation of halogenated by-products of parabens in chlorinated water>, COA of Formula: C8H7ClO3, the main research area is paraben halogenated product formation chlorinated water; sewage raw dichloro paraben pollution.
Chem. transformations of four alkyl esters of p-hydroxybenzoic acid, parabens, in chlorinated water samples are investigated. Quantification of the parent species and identification of their reaction byproducts were performed using gas chromatog./mass spectrometry. Experiments were accomplished considering free chlorine and paraben concentrations at the mg/L and μg/L level, resp. Concentration of water samples, using solid-phase extraction, and silylation of the target species were carried out in order to improve the detectability of parent species and their possible transformation products, achieving quantification limits at the low ng/L level. Under the employed exptl. conditions, the decrease in the concentrations of parabens followed pseudo-first-order kinetics. Half-life values obtained for model ultrapure water solutions were in good agreement with those observed in tap water samples. For the first type of sample, only two byproducts were detected for each paraben. They corresponded to chlorination of the aromatic ring in one or two carbons situated in ortho positions to the hydroxyl group. Both species were also generated after the addition of parabens to chlorinated tap water. Moreover, three new transformation products were noticed for each parent compound They were identified as bromo- and bromochloro-parabens, formed due to the existence of traces of bromide in tap water sources. Experiments carried out by mixing paraben-containing personal care products with tap water, containing free chlorine, confirmed the formation of all the above described halogenated byproducts. In addition, the presence of the di-chlorinated forms of Me and Pr paraben has been detected for first time in raw sewage water samples.
Analytica Chimica Acta published new progress about Bromides Role: OCU (Occurrence, Unclassified), RCT (Reactant), OCCU (Occurrence), RACT (Reactant or Reagent). 3964-57-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H7ClO3, COA of Formula: C8H7ClO3.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics