At desired times, 2 μL of chlorination assay mixture was added to 8 μL of a 0.5% TFA/H2O mixture to stop the reaction.
It was observed that TiO2 caused partial oxidation of the carbon particles created during high-temperature chlorination of the TiC/TiO2 mixture.
Other electrophilic substitution reactions of 3,3′-dmbp include chlorination that gives a mixture of 2-, 4- and 6-chloro-3,3′-dmbp with the 4-isomer being dominating [38], bromination and iodination that lead to the 4-halo derivatives [39] and sulphonation [40] that with an excess of 98%H2SO44 leads to a 52 48 mixture of the 4,4′-and 4,6′-disulphonic acids.
In this issue of EHP, investigators assess the reproductive toxicity of a mixture of chlorination DBPs in rats.
Further detailed toxicological assessments of mixtures of chlorination by-products are also needed, as humans are most commonly exposed to complex mixtures of these compounds rather than to a single compound [ 27].
Exposure to a mixture of regulated chlorination DBPs at 500× the MCLs had no adverse effects on any reproductive end points examined.
The turnover number is enhanced by the inclusion of sacrifical reductants or chlorination traps in the reaction mixture, including DMSO, a reagent that combines rapidly and specifically with HOCl.
Thermodynamic considerations assisted by quantum chemical calculations showed the low effect of hydrogen in the Cl2/H2 gas mixtures during SiC chlorination for the nucleation of diamond phases.
We tested the hypothesis that PCB mixtures stimulate uterine contractions in a manner inversely related to the degree of chlorination and the presence of chlorines in the ortho- position of the biphenyl constituents of the mixtures.
In the current study, Simmons and colleagues assessed the reproductive health effects of a mixture of the nine regulated chlorination DBPs across three generations of rats.
Toxaphene, a dense, yellowish, semisolid mixture of organic compounds made by chlorination of camphene (a hydrocarbon obtained from turpentine) and used as an insecticide.
