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1,2,3,4-Tetrachlorobenzene

Also known as: 1,2,3,4-tcb, s-tetrachlorobenzene, tetrachlorobenzene, 1,2,3,4-tetrachlorobenzol, 1,2,3,4-four chlorobenzene, benzene, 1,2,3,4-tetrachloro-, 1,2,3,4-Tetrachlorobenzene 95+%, 1,2,3,4-Tetrachlorobenzene,98%, 1,2,3,4-tetrachloro-benzen, 1,2,3,4-tetraclorobenzene, 2,3,4,5-tetrachlorobenzene, NSC 50729, MFCD00000538, EINECS 211-214-0

1,2,3,4-Tetrachlorobenzene (CAS 634-66-2) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H2Cl4 and a molecular weight of 215.89200 g/mol. Key properties include a melting point of 44 °C, a boiling point of 254 °C761 mm Hg(lit.), a density of 1,73 g/cm3 and a flash point of >110.0 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed and H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.
634-66-2
Jingsj CID
J-26080-0
Molecular Formula
C6H2Cl4
Molecular Weight
215.89200 g/mol
Category
Aromatic Hydrocarbons
Last updated
11/3/2026
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Physicochemical Properties

Melting Point44 °C
Boiling Point254 °C761 mm Hg(lit.)
Density1,73 g/cm3
Flash Point>110.0 °C
Exact Mass213.89100
LogP4.30020
Refractive Index1.582

GHS Safety & Compliance

Irritant / Environmental HazardSignal word: Warning
  • H302 — Harmful if swallowed
  • H410 — Very toxic to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of 1,2,3,4-Tetrachlorobenzene?

The CAS number of 1,2,3,4-Tetrachlorobenzene is 634-66-2.

What are the molecular formula and molecular weight of 1,2,3,4-Tetrachlorobenzene?

1,2,3,4-Tetrachlorobenzene has molecular formula C6H2Cl4 and molecular weight 215.89200 g/mol.

Is 1,2,3,4-Tetrachlorobenzene hazardous?

1,2,3,4-Tetrachlorobenzene has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; 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:

How to cite: Jingsj. "1,2,3,4-Tetrachlorobenzene (CAS 634-66-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26080-0 (accessed 2026-11-09).

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