2,3,3',4,4',5-Hexachlorobiphenyl

Also known as: PCB-156, 2,3,3',4,4',5-Hexachloro-1,1'-biphenyl, 3,4,2',3',4',5'-Hexachlorobiphenyl, PCB No 156

2,3,3',4,4',5-Hexachlorobiphenyl (CAS 38380-08-4) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H4Cl6 and a molecular weight of 360.878 g/mol. Key properties include a melting point of 127°C, a boiling point of 417.1±40.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 208.7±24.7 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H304 and H315 — Causes skin irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 38380-08-4
Jingsj CID: J-978038-5
Molecular Formula: C₁₂H₄Cl₆
Molecular Weight: 360.878 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	127°C
Boiling Point	417.1±40.0 °C at 760 mmHg
Density	1.6±0.1 g/cm3
Flash Point	208.7±24.7 °C
Exact Mass	357.844421
LogP	6.74
Vapor Pressure	0.0±0.9 mmHg at 25°C
Refractive Index	1.627
Storage Conditions	2-8°C

GHS Safety & Compliance

Flammable / Irritant / Health Hazard / Environmental HazardSignal word: Danger

H225 — Highly flammable liquid and vapour
H304
H315 — Causes skin irritation
H336 — May cause drowsiness or dizziness
H373 — May cause damage to organs through prolonged exposure
H411 — Toxic to aquatic life with long lasting effects

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 2,3,3',4,4',5-Hexachlorobiphenyl?

The CAS number of 2,3,3',4,4',5-Hexachlorobiphenyl is 38380-08-4.

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

2,3,3',4,4',5-Hexachlorobiphenyl has molecular formula C12H4Cl6 and molecular weight 360.878 g/mol.

Is 2,3,3',4,4',5-Hexachlorobiphenyl hazardous?

2,3,3',4,4',5-Hexachlorobiphenyl has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H304; H315 — Causes skin irritation.

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. "2,3,3',4,4',5-Hexachlorobiphenyl (CAS 38380-08-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-978038-5 (accessed 2026-11-06).

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