2,2',3,3',4,5,5'-Heptachlorobiphenyl

Also known as: PCB 172, PCB No. 172, 1,1'-Biphenyl, 2,2',3,3',4',5,5'-heptachloro-, 2,2',3,3',4,5,5'-Heptachloro-1,1'-biphenyl

2,2',3,3',4,5,5'-Heptachlorobiphenyl (CAS 52663-74-8) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H3Cl7 and a molecular weight of 395.32300 g/mol. Key properties include a melting point of 131.31°C (estimate), a boiling point of 427.2ºC at 760mmHg, a density of 1.658g/cm3 and a flash point of 213ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 52663-74-8
Jingsj CID: J-978135-5
Molecular Formula: C₁₂H₃Cl₇
Molecular Weight: 395.32300 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	131.31°C (estimate)
Boiling Point	427.2ºC at 760mmHg
Density	1.658g/cm3
Flash Point	213ºC
Exact Mass	391.80500
LogP	7.92740
Refractive Index	1.632

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',3,3',4,5,5'-Heptachlorobiphenyl?

The CAS number of 2,2',3,3',4,5,5'-Heptachlorobiphenyl is 52663-74-8.

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

2,2',3,3',4,5,5'-Heptachlorobiphenyl has molecular formula C12H3Cl7 and molecular weight 395.32300 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',3,3',4,5,5'-Heptachlorobiphenyl (CAS 52663-74-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-978135-5 (accessed 2026-11-09).

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