2,2',5,5'-Tetrachlorobiphenyl

Also known as: 2,2',5,5'-Tetrachloro-1,1'-biphenyl, 2,2',5,5'-TCB, PCB 52, PCB NO 52, BZ NO 52, BALLSCHMITER NO 52, 1,1'-Biphenyl, 2,2',5,5'-tetrachloro-

2,2',5,5'-Tetrachlorobiphenyl (CAS 35693-99-3) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H6Cl4 and a molecular weight of 291.988 g/mol. Key properties include a melting point of 87℃, a boiling point of 344.9±37.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 161.9±23.9 °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.: 35693-99-3
Jingsj CID: J-1992883-7
Molecular Formula: C₁₂H₆Cl₄
Molecular Weight: 291.988 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	87℃
Boiling Point	344.9±37.0 °C at 760 mmHg
Density	1.4±0.1 g/cm3
Flash Point	161.9±23.9 °C
Exact Mass	289.922363
LogP	5.92
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.612
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
H410 — Very 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 2,2',5,5'-Tetrachlorobiphenyl?

The CAS number of 2,2',5,5'-Tetrachlorobiphenyl is 35693-99-3.

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

2,2',5,5'-Tetrachlorobiphenyl has molecular formula C12H6Cl4 and molecular weight 291.988 g/mol.

Is 2,2',5,5'-Tetrachlorobiphenyl hazardous?

2,2',5,5'-Tetrachlorobiphenyl 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. "2,2',5,5'-Tetrachlorobiphenyl (CAS 35693-99-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1992883-7 (accessed 2026-11-09).

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