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C 6 H 4 Br 2: Molar mass: 235.906 g/mol Appearance colorless liquid colorless liquid white solid CAS number [583-53-9] [108-36-1] [106-37-6] Properties Density and phase: 1.9940 g/ml, liquid 1.9523 g/ml, liquid 1.84 g/ml, solid Solubility in water: practically insoluble Other solubilities Soluble in 70 parts ethanol. Soluble in benzene ...
1,2-Dibromobenzene (o-dibromobenzene) is an aryl bromide and isomer of dibromobenzene. It is one of three isomers, the others being 1,3- and 1,4-dibromobenzene. It is a colorless liquid, although impure samples appear yellowish. The compound is a precursor to many 1,2-disubstituted derivatives of benzene.
2 and triphenylphosphine (PPh 3 ), tetrabutylammonium iodide (TBAI) as a phase-transfer catalyst , and sodium hydroxide as a base. Below is an example reaction of 1,3-dibromobenzene to isophthalic acid .
Bromobenzene is prepared by the action of bromine on benzene in the presence of Lewis acid catalysts such as aluminium chloride or ferric bromide. [3]Bromobenzene is used to introduce a phenyl group into other compounds.
The known empirical LD50 values for 1,2-dibromoethane are 140 mg kg −1 (oral, rat), and 300.0 mg kg −1 (dermal, rabbit). [ 5 ] 1,2-Dibromoethane is a known carcinogen , with pre-1977 exposure levels ranking it as the most carcinogenic substance on the HERP Index.
While hiccups are usually harmless and don't last long in most people, some individuals can experience them chronically.
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After introducing medically assisted treatment in 2013, Seppala saw Hazelden’s dropout rate for opiate addicts in the new revamped program drop dramatically. Current data, which covers between January 1, 2013 and July 1, 2014, shows a dropout rate of 7.5 percent compared with the rate of 22 percent for the opioid addicts not in the program.