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T1 Polychlorinated Biphenyls (PCBs) and Polychlorinated Terphenyls (PCTs) Health and Safety Guide 68
A1 United Nations Environment Programme, 
A1 World Health Organization, 
A1 International Labour Organisation, 
K1 health
K1 polychlorinated biphenyl
K1 polychlorinated terphenyl
K1 environmentally hazardous substance
K1 pollutant
K1 chemical
K1 waste disposal
K1 health hazard
K1 carcinogen
SN 92 4 151068 4
YR 1992
FD 1992
LK https://wedocs.unep.org/handle/20.500.11822/29621
UL https://wedocs.unep.org/handle/20.500.11822/29621
NO The PCBs are chlorinated hydrocarbons that are manufactured commercially by the progressive chlorination of biphenyl in the presence of a suitable catalyst (e.g., iron chloride). Depending on the reaction conditions, the degree of chlorination can vary between 21 and 68% (w/w). The yield is always a mixture of different compounds and congeners. Thus, a total of 209 different chemical components may exist, but only about 130 of these are likely to occur in commercial products or mixtures of these compounds.
DS UN Environment Document Repository
RD Sep 22, 2026