2,2',4,5,5'-Pentachlorobiphenyl

Also known as: PCB 101, PCB No 101, 2,2',4,5,5'-PCB, 1,1'-Biphenyl, 2,2',4,5,5'-pentachloro-, 2,2',4,5,5'-Pentachloro-1,1'-biphenyl, 2,4,5,2',5'-pentachlorobiphenyl, 2,5,2',4',5'-pentachlorobiphenyl, PCB101/84

2,2',4,5,5'-Pentachlorobiphenyl (CAS 37680-73-2) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H5Cl5 and a molecular weight of 326.433 g/mol. Key properties include a melting point of 78℃, a boiling point of 371.0±37.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 177.8±23.9 °C. It is classified under GHS with signal word Warning and hazard statements H373 — May cause damage to organs through prolonged exposure and H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 37680-73-2
Jingsj CID: J-1328615-2
Molecular Formula: C₁₂H₅Cl₅
Molecular Weight: 326.433 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	78℃
Boiling Point	371.0±37.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	177.8±23.9 °C
Exact Mass	323.883392
LogP	6.38
Vapor Pressure	0.0±0.8 mmHg at 25°C
Refractive Index	1.620
Storage Conditions	2-8°C

GHS Safety & Compliance

Health Hazard / Environmental HazardSignal word: Warning

H373 — May cause damage to organs through prolonged exposure
H410 — Very toxic to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of 2,2',4,5,5'-Pentachlorobiphenyl?

The CAS number of 2,2',4,5,5'-Pentachlorobiphenyl is 37680-73-2.

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

2,2',4,5,5'-Pentachlorobiphenyl has molecular formula C12H5Cl5 and molecular weight 326.433 g/mol.

Is 2,2',4,5,5'-Pentachlorobiphenyl hazardous?

2,2',4,5,5'-Pentachlorobiphenyl has GHS signal word Warning and hazard statements H373 — May cause damage to organs through prolonged exposure; H410 — Very toxic to aquatic life with long lasting effects.

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',4,5,5'-Pentachlorobiphenyl (CAS 37680-73-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1328615-2 (accessed 2026-11-09).

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