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Impurities and reference standards

Pcb 126

Also known as 3,3',4,4',5-Pentachlorobiphenyl, 3,3',4,4',5-Pentachloro-1,1'-biphenyl, 3,4,5,3',4'-Pentachlorobiphenyl

CAS 57465-28-8Formula C12H5Cl5Molar mass 326.44 g/molEC 682-346-8
GHS signal word: Warning. Pictograms: Serious health hazard, Hazardous to the environment 1 supplier listed
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Pcb 126 chemical structure, C12H5Cl5, CAS 57465-28-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
57465-28-8
Formula
C12H5Cl5
Molar mass
326.44 g/mol
EC number
682-346-8
HS code
290399
Category
Impurities and reference standards

What is Pcb 126?

Plain description, key identifiers and synonyms

3,3',4,4',5-pentachlorobiphenyl is a pentachlorobiphenyl in which the chlorines are located at the 3, 4, 5, 3', and 4' positions. It is a trichlorobenzene and a pentachlorobiphenyl.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1,2,3-trichloro-5-(3,4-dichlorophenyl)benzene
CAS number
57465-28-8 CAS number cross-checked
EC number
682-346-8
Molecular formula
C12H5Cl5
UNII
TSH69IA9XF
InChIKey
REHONNLQRWTIFF-UHFFFAOYSA-N
InChI
InChI=1S/C12H5Cl5/c13-8-2-1-6(3-9(8)14)7-4-10(15)12(17)11(16)5-7/h1-5H
SMILES (canonical and isomeric)
C1=CC(=C(C=C1C2=CC(=C(C(=C2)Cl)Cl)Cl)Cl)Cl

Synonyms

  • 3,3',4,4',5-Pentachlorobiphenyl
  • 3,3',4,4',5-Pentachloro-1,1'-biphenyl
  • 3,4,5,3',4'-Pentachlorobiphenyl
  • 3,4,3',4',5'-Pentachlorobiphenyl
  • 3,4,3',4',5-pentachlorobiphenyl
  • PCB No. 126
  • 1,2,3-trichloro-5-(3,4-dichlorophenyl)benzene
  • 3,3',4',4',5 Pentachlorobiphenyl (PCB 126)
  • 1,1'-Biphenyl, 3,3',4,4',5-pentachloro-
  • Bifonazole Impurity 50
  • 57465-28-8(Isooctane)
  • Polychlorinated biphenyl 126
  • 3,4,5,3',4'-Pentachloro-biphenyl
  • 3,3'',4,4'',5-Pentachlorobiphenyl
  • 3,4,5,3'',4''-Pentachlorobiphenyl
  • 3,4,3'',4'',5''-Pentachlorobiphenyl
  • PCB No. 126 10 |Ig/mL in Isooctane
  • PCB No. 126 10 microg/mL in Isooctane
  • 3,3',4,4',5-PCB
  • 1,1'-Biphenyl, 3,3',4,4',5-pentachloro
  • 3,3',4,4,',5-Pentachloro-1,1'-biphenyl
  • 3,3'',4,4'',5-pentachloro-1,1''-biphenyl
  • 3,3',4,4',5-Pentachlorobiphenyl (PCB 126)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
326.44 g/molcalc.
Exact mass
323.8834 Dacalc.
LogP (octanol/water)
6.62calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
1calc.
Heavy atoms
17calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc(-c2ccccc2)cc1

c1ccc(-c2ccccc2)cc1

2 rings, 12 atoms, the Biphenyl ring system.

32,228 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H373May cause damage to organs through prolonged or repeated exposure.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (5)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P273Avoid release to the environment.
  • P319Get medical help if you feel unwell.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Pcb 126 suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

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  • Ambinter
    France, OrleansUnclaimed profile
    Pcb 126Grade, purity and minimum order on request
    Price on request
    View

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Where suppliers are based

1 supplier in 1 country

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Pcb 126 price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Pharmacological actions

  • Estrogen Antagonists

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Pcb 126 is traded under.

HS 2903.99Indicative HS code

Halogenated derivatives of aromatic hydrocarbons, other

World exports in 2024
$798M
−15.8% vs 2023, imports $786M
2019 to 2024
Top exporters
  1. China51.0%
  2. United States15.9%
  3. Belgium8.6%
Top importers
  1. India * partner reported16.1%
  2. United States14.7%
  3. Germany10.9%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Pcb 126 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Pcb 126, based on the data on this page

What is Pcb 126?

3,3',4,4',5-pentachlorobiphenyl is a pentachlorobiphenyl in which the chlorines are located at the 3, 4, 5, 3', and 4' positions. It is a trichlorobenzene and a pentachlorobiphenyl.

What is the CAS number of Pcb 126?

The CAS registry number of Pcb 126 is 57465-28-8.

What is the molecular formula and weight of Pcb 126?

The molecular formula of Pcb 126 is C12H5Cl5 and its molar mass is 326.44 g/mol.

What is Pcb 126 used for?

Known uses and roles of Pcb 126 include estrogen antagonists.

Is Pcb 126 hazardous?

Pcb 126 carries the GHS signal word "Warning". Main hazards: may cause damage to organs through prolonged or repeated exposure, very toxic to aquatic life, very toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Pcb 126?

Pcb 126 is usually classified under HS code 290399 (Halogenated derivatives of aromatic hydrocarbons, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pcb 126?

CompoundList lists 1 supplier of Pcb 126 in France. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Pcb 126?

Suppliers quote Pcb 126 on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Pcb 126

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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