4-Chlorocatechol
Also known as: 4-Chlorobenzene-1,2-diol, 4-Chloro-1,2-dihydroxybenzene, 4-Chloropyrocatechol, 1,2-Benzenediol, 4-chloro-, 3,4-dihydroxychlorobenzene, p-Cl-catechol, Chlorocatechol, AIDS-017780
4-Chlorocatechol (CAS 2138-22-9) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C6H5ClO2 and a molecular weight of 144.556 g/mol. Key properties include a melting point of 90-94 °C(lit.), a boiling point of 267.1±20.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 115.3±21.8 °C. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2138-22-9
- Jingsj CID
- J-13520-6
- Molecular Formula
- C6H5ClO2
- Molecular Weight
- 144.556 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 90-94 °C(lit.) |
|---|---|
| Boiling Point | 267.1±20.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 115.3±21.8 °C |
| Exact Mass | 143.997803 |
| PSA | 40.46000 |
| LogP | 2.15 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.629 |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Activity & Biological Data
| Additional Information | [1]. Pankaj Kumar Arora, et al. Novel degradation pathway of 4-chloro-2-aminophenol via 4-chlorocatechol in Burkholderia sp. RKJ 800. Environ Sci Pollut Res Int. 2014 Feb;21(3):2298-2304. [2]. Raffaella Caglio, et al. Fine-tuning of catalytic properties of catechol 1,2-dioxygenase by active site tailoring. Chembiochem. 2009 Apr 17;10(6):1015-24. |
|---|
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-Chlorocatechol?
The CAS number of 4-Chlorocatechol is 2138-22-9.
What are the molecular formula and molecular weight of 4-Chlorocatechol?
4-Chlorocatechol has molecular formula C6H5ClO2 and molecular weight 144.556 g/mol.
Is 4-Chlorocatechol hazardous?
4-Chlorocatechol has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of 4-Chlorocatechol?
For 4-Chlorocatechol, Upstream Products: 4-Chlorophenol, 5-Chlorosalicylaldehyde, Catechol; Downstream Products: 4,5-Dichlorocatechol, 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-Chlorocatechol (CAS 2138-22-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-13520-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.