Compound

Congener number

Abbreviation

Molecular weight

Formulae

Monochlorobiphenyls

3

MCBs

189

C₁₂H₉Cl

Dichlorobiphenyls

12

DCBs

233

C₁₂H₈Cl₂

Trichlorobiphenyls

24

TCBs

258

C₁₂H₇Cl₃

Tetrachlorobiphenyls

42

TeCBs

292

C₁₂H₆Cl₄

Pentachlorobiphenyls

46

PeCBs

326

C₁₂H₅Cl₅

Hexachlorobiphenyls

42

HCBs

361

C₁₂H₄Cl₆

Heptachlorobiphenyls

24

HeCBs

395

C₁₂H₃Cl₇

Octachlorobiphenyls

12

OCBs

430

C₁₂H₂Cl₈

Nonachlorobiphenyls

3

NCBs

189

C₁₂HCl₉

Decachlorobiphenyls

1

DeCBs

233

C₁₂Cl₁₀