polychlorinated biphenyl

(redirected from Aroclors)
Also found in: Medical, Encyclopedia.
Related to Aroclors: Pcbs

pol·y·chlo·rin·at·ed biphenyl


polychlorinated biphenyl

(Elements & Compounds) any of a group of compounds in which chlorine atoms replace the hydrogen atoms in biphenyl: used in industry in electrical insulators and in the manufacture of plastics; a toxic pollutant that can become concentrated in animal tissue. Abbreviation: PCB

polychlorinated biphenyl (PCB)

n bifenilo policlorado (BPC), policlorobifenilo
Mentioned in ?
References in periodicals archive ?
2010) developed a PCB mixture resembling the average congener profile in Chicago air by combining Aroclors 1242 and 1254.
b) Average values for 30-m and 60-m sites sampled in 1985 and 1990 for the SCCWRP Reference Site Surveys (SCCWRP, 1987, 1992); total DDT is the sum of five isomers, total PCB is sum of two Aroclors, and HPAH represents sum of 30 LPAH and HPAH.
A new reference material (RM), RM 8504, has been prepared for use as a diluent oil with Aroclors in transformer oil Standard Reference Materials (SRMs) 3075 to 3080 and SRM 3090 when developing and validating methods for the determination of polychlorinated biphenyls (PCBs) as Aroclors in transformer oil or similar matrices.
Non-, mono-, and di-ochlorobiphenyl concentrations and their toxic equivalents to 2,3,7,8-tetrachlorodibenzo[p]dioxin in Aroclors and digestive glands from American lobster (Homarus americanus) captured in Atlantic Canada.
These NJDEP surveys focused on bioaccumulation of isomers exclusively found in Aroclors 1248, 1254, and 1260.
In the United States, Monsanto Company has manufactured different mixtures of PCBs, the most widely used mixtures being Aroclors 1016, 1242, 1248, 1254, and 1260.
Monsanto produced PCBs under the name Aroclors beginning in 1930.
Comparative potencies of Aroclors 1232, 1242, 1248, 1254, and 1260 in male Wistar rats--assessment of the toxic equivalency factor (TEF) approach for polychlorinated biphenyls (PCBs).
Six additional SRMs of the same Aroclors in transformer oil have also been prepared.
1985) studied 194 capacitor workers exposed to Aroclors (industrial mixtures of PCBs) before and after the plant discontinued use of PCBs and found abnormally high lymphocyte counts, defined as > 2 SDs from the internal age- and sex-adjusted standards used by the clinical laboratory, among workers before PCB discontinuation.
For example, Monsanto marketed Aroclors 1221, 1231, and 1242 up to 1268, which contain, respectively, 21%, 31%, and 42% to 68% chlorine by weight.