1,2-Dichloro-4-iodobenzene
Also known as: 3,4-Dichloroiodobenzene, 3,4-Dichloro-1-iodobenzene, 3,4-Dichlorophenyl iodide, 1,2-Dichloro-4-iodo-benzene, Benzene, 1,2-dichloro-4-iodo-, 4-Iodo-1,2-dichlorobenzene, 4-Iodo-o-dichlorobenzene
1,2-Dichloro-4-iodobenzene (CAS 20555-91-3) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H3Cl2I and a molecular weight of 272.898 g/mol. Key properties include a melting point of 27-29 °C(lit.), a boiling point of 259.0±20.0 °C at 760 mmHg, a density of 2.0±0.1 g/cm3 and a flash point of 110.5±21.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 20555-91-3
- Jingsj CID
- J-50101-9
- Molecular Formula
- C6H3Cl2I
- Molecular Weight
- 272.898 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 27-29 °C(lit.) |
|---|---|
| Boiling Point | 259.0±20.0 °C at 760 mmHg |
| Density | 2.0±0.1 g/cm3 |
| Flash Point | 110.5±21.8 °C |
| Exact Mass | 271.865631 |
| LogP | 3.79 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.643 |
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 1,2-Dichloro-4-iodobenzene?
The CAS number of 1,2-Dichloro-4-iodobenzene is 20555-91-3.
What are the molecular formula and molecular weight of 1,2-Dichloro-4-iodobenzene?
1,2-Dichloro-4-iodobenzene has molecular formula C6H3Cl2I and molecular weight 272.898 g/mol.
What are the upstream and downstream products of 1,2-Dichloro-4-iodobenzene?
For 1,2-Dichloro-4-iodobenzene, Upstream Products: 3,4-Dichloroaniline, 2-(3,4-Dichlorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 1,2-Dichlorobenzene; Downstream Products: 2,3,3',4',6-Pentachlorobiphenyl, 2,3,3',4,4'-Pentachlorobiphenyl, 3,3',4,4'-Tetrachlorobiphenyl.
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-Dichloro-4-iodobenzene (CAS 20555-91-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-50101-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.