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1,2,7,8-Tetrachlorodibenzo-p-dioxin

1,2,7,8-四氯二苯并-对-二恶英

Also known as: 1,2,7,8-TCDD, 1,2,7,8-Tetrachlorodibenzo[1,4]dioxin, 1,2,7,8-Tetrachlorodibenzo[b,e][1,4]dioxin, 1,2,7,8-Tetrachlorodibenzodioxin, 1,2,7,8-tetrachloro-dibenzo-p-dioxin, 1,2,7,8-Tetrachlorodibenzo-para-dioxin, 1,2,7,8-tetrachlorodioxine, Dibenzo-p-dioxin, 1,2,7,8-tetrachloro-

1,2,7,8-Tetrachlorodibenzo-p-dioxin (CAS 34816-53-0) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H4Cl4O2 and a molecular weight of 321.97100 g/mol. It is also known as 1,2,7,8-TCDD, 1,2,7,8-Tetrachlorodibenzo[1,4]dioxin and 1,2,7,8-Tetrachlorodibenzo[b,e][1,4]dioxin. Key properties include a boiling point of 417.7ºC at 760 mmHg, a density of 1.643g/cm3 and a flash point of 164.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
34816-53-0
Jingsj CID
J-1183804-5
Molecular Formula
C12H4Cl4O2
Chinese Name
1,2,7,8-四氯二苯并-对-二恶英
Molecular Weight
321.97100 g/mol
Category
Aromatic Hydrocarbons
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point417.7ºC at 760 mmHg
Density1.643g/cm3
Flash Point164.1ºC

Frequently Asked Questions

What is the CAS number of 1,2,7,8-Tetrachlorodibenzo-p-dioxin?

The CAS number of 1,2,7,8-Tetrachlorodibenzo-p-dioxin is 34816-53-0.

What are the molecular formula and molecular weight of 1,2,7,8-Tetrachlorodibenzo-p-dioxin?

1,2,7,8-Tetrachlorodibenzo-p-dioxin has molecular formula C12H4Cl4O2 and molecular weight 321.97100 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "1,2,7,8-Tetrachlorodibenzo-p-dioxin (CAS 34816-53-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1183804-5 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.