hexachlorobutadiene


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hexachlorobutadiene

[¦hek·sə¦klȯr·ō‚byüd·ə′dī‚ēn]
(organic chemistry)
Cl2C:CClCCl:CCl2 A colorless liquid with mild aroma, boiling at 210-220°C; soluble in alcohol and ether, insoluble in water; used as solvent, heat-transfer liquid, and hydraulic fluid.
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Waste from north quarry dating back over 50 years has produced a by-product called hexachlorobutadiene (HCBD).
In practice, 32 substances are proposed as priority substances under the Framework Directive, divided into three groups:- 11 substances are proposed as "dangerous priority substances": brominated diphenylether, cadmium, chloroalcanes C10-13, hexachlorobenzene, hexachlorobutadiene, hexachlorocyclohexane; mercury, nonylphenols, poly-aromatic hydrocarbons(PAH) (pentachlorobenzene, tributytin compounds- 11 others as priority substances on appraisal: anthracene, atrazine, chlorpyrifos, di(2-ethylhexyl)phtalate (DEHP), endosulfan, lead, naphthalene, octylphenols, pentachlorophenol, trichlorobenzene, trifluralin.
The five chemicals to receive expedited action are: Decabromodiphenyl ethers (DecaBDE), used as a flame retardant in textiles, plastics and polyurethane foam; Hexachlorobutadiene (HCBD), used in the manufacture of rubber compounds and lubricants and as a solvent; Pentachlorothio-phenol (PCTP), used as an agent to make rubber more pliable in industrial uses; Tris (4-isopropylphenyl) phosphate, used as a flame retardant in consumer products and other industrial uses; and 2,4,6-Tris(tert-butyl)phenol, used as a fuel, oil, gasoline or lubricant additive.
After its formal adoption by the Council and the European Parliament, the list will become Annex X of Directive 2000/60/EC creating a framework for a Community water policy.In practice, 32 substances are proposed as priority substances under the Framework Directive:- brominated diphenylether, cadmium, chloroalcanes C10-13, hexachlorobenzene, hexachlorobutadiene, hexachlorocyclohexane; mercury, nonylphenols, poly-aromatic hydrocarbons(PAH) (pentachlorobenzene, tributytin compounds- 1 others as priority substances on appraisal : anthracene, atrazine, chlorpyrifos, di(2-ethylhexyl)phtalate (DEHP), endosulfan, lead, naphthalene, octylphenols, pentachlorophenol, trichlorobenzene, trifluralin.
The Persistent Organic Pollutants Review Committee, a subsidiary body of the Stockholm Convention on Persistent Organic Pollutants (POPs), recommended the inclusion of two additional chemicals under the Convention, polychlorinated napththalenes (PCN) and hexachlorobutadiene (HCBD), thus lining them up for eventual phase-out.
The role of cytochrome p4503a1/2 in the sex-specific sulfoxidation of the hexachlorobutadiene metabolite, N-acetyl-S-(pentachlorobutadienyl)-L-cysteine in rats.
Task I: Hexachlorobenzene and Hexachlorobutadiene Pollution from Chlorocarbon Processes.
Bacterial B-lyase mediated cleavage and mutagenicity of cysteine conjugates derived from the nephrocarcinogenic alkenes trichloroethylene, tetrachloroethylene, and hexachlorobutadiene. Chem-Biol Interact 60:31-45 (1986).
Due to evidence of kidney tumors in animals, the other chemical, hexachlorobutadiene (HCB), has been classified by the U.S.