4,5-Dichlorocatechol
Also known as: 1,2-Benzenediol,4,5-dichloro-, 4,5-dichloro-1,2-benzenediol, 4,5-dichloro-1,2-dihydroxybenzene, 4,5-dichlorobenzene-1,2-diol, 4,5-dichloropyrocatechol, Pyrocatechol,4,5-dichloro-
4,5-Dichlorocatechol (CAS 3428-24-8) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C6H4Cl2O2 and a molecular weight of 179.001 g/mol. Key properties include a melting point of 110-115ºC(lit.), a boiling point of 302.2±37.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 136.6±26.5 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 3428-24-8
- Jingsj CID
- J-7937-8
- Molecular Formula
- C6H4Cl2O2
- Molecular Weight
- 179.001 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 110-115ºC(lit.) |
|---|---|
| Boiling Point | 302.2±37.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 136.6±26.5 °C |
| Exact Mass | 177.958832 |
| PSA | 40.46000 |
| LogP | 3.29 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.642 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
- H400 — Very toxic to aquatic life
Activity & Biological Data
| Additional Information | [1]. T Potrawfke , et al. Chlorocatechols Substituted at Positions 4 and 5 Are Substrates of the Broad-Spectrum Chlorocatechol 1,2-dioxygenase of Pseudomonas Chlororaphis RW71. J Bacteriol. 2001 Feb;183(3):997-1011. |
|---|
Customs & Trade Information
| HS Code | 2908199090 |
|---|---|
| Summary | HS: 2908199090. derivatives of polyphenols or phenol-alcohols containing only halogen substituents and their salts. 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 4,5-Dichlorocatechol?
The CAS number of 4,5-Dichlorocatechol is 3428-24-8.
What are the molecular formula and molecular weight of 4,5-Dichlorocatechol?
4,5-Dichlorocatechol has molecular formula C6H4Cl2O2 and molecular weight 179.001 g/mol.
Is 4,5-Dichlorocatechol hazardous?
4,5-Dichlorocatechol has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 4,5-Dichlorocatechol?
For 4,5-Dichlorocatechol, Upstream Products: Catechol, 1,2-Dichloro-4,5-dimethoxybenzene, 4,5-Dichlorosalicylaldehyde; Downstream Products: 1,2,3,7,8-Pentachlorodibenzo-p-dioxin, 1,2-Cyclohexanediol, Cyclohexanone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4,5-Dichlorocatechol (CAS 3428-24-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-7937-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.