2,2',3,4,4',5,5',6-Octachlorobiphenyl

Also known as: PCB 203, PCB No. 203, 2,2',3,4,4',5,5',6-Octachloro-1,1'-biphenyl, 1,1'-Biphenyl, 2,2',3,4,4',5,5',6-octachloro-, 1,2,3,4,5-pentachloro-6-(2,4,5-trichlorophenyl)benzene, 2,2',3,4,4',5,5',6-Octacb, 2,2',3,4,4',5,5',6-Octachlorobiphenyl (unlabeled certified standard)

2,2',3,4,4',5,5',6-Octachlorobiphenyl (CAS 52663-76-0) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H2Cl8 and a molecular weight of 429.76800 g/mol. Key properties include a melting point of 150.67°C (estimate), a boiling point of 432ºC at 760 mmHg, a density of 1.716 g/cm3 and a flash point of 213.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 52663-76-0
Jingsj CID: J-1331114-3
Molecular Formula: C₁₂H₂Cl₈
Molecular Weight: 429.76800 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	150.67°C (estimate)
Boiling Point	432ºC at 760 mmHg
Density	1.716 g/cm3
Flash Point	213.5ºC
Exact Mass	425.76600
LogP	8.58080
Refractive Index	1.638

Customs & Trade Information

HS Code	2903999090
Summary	2903999090 halogenated derivatives of aromatic hydrocarbons VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 2,2',3,4,4',5,5',6-Octachlorobiphenyl?

The CAS number of 2,2',3,4,4',5,5',6-Octachlorobiphenyl is 52663-76-0.

What are the molecular formula and molecular weight of 2,2',3,4,4',5,5',6-Octachlorobiphenyl?

2,2',3,4,4',5,5',6-Octachlorobiphenyl has molecular formula C12H2Cl8 and molecular weight 429.76800 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "2,2',3,4,4',5,5',6-Octachlorobiphenyl (CAS 52663-76-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1331114-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.