4-Chlorobenzenesulfonic acid
Also known as: p-Chlorobenzenesulfonic acid, p-chlorobenzenesulphonic acid, 4-Chlorobenzene sulfonic acid, 4-chlorobenzene-1-sulfonic acid, 4-chlorobenzenesulphonic acid, 4-CHLOROBENZENESULFONIC ACID, 4-CHLORO BENZENE SULPHONIC ACID, 4-CHLOROBENZENE SULPHONIC ACID, Benzenesulfonic acid, 4-chloro-, Benzenesulfonic acid, p-chloro-, Closylate, P-CHLOROBENZENESULFONIC ACID, P-CHLOROPHENYLSULFONIC ACID
4-Chlorobenzenesulfonic acid (CAS 98-66-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H5ClO3S and a molecular weight of 192.620 g/mol. Key properties include a melting point of 102 °C, a boiling point of 258.6±0.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 108ºC. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed and 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.
- 98-66-8
- Jingsj CID
- J-44849-7
- Molecular Formula
- C6H5ClO3S
- Molecular Weight
- 192.620 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 102 °C |
|---|---|
| Boiling Point | 258.6±0.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 108ºC |
| Exact Mass | 191.964798 |
| PSA | 62.75000 |
| LogP | 1.33 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.591 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2904909090 |
|---|---|
| Summary | HS:2904909090 sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated 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-Chlorobenzenesulfonic acid?
The CAS number of 4-Chlorobenzenesulfonic acid is 98-66-8.
What are the molecular formula and molecular weight of 4-Chlorobenzenesulfonic acid?
4-Chlorobenzenesulfonic acid has molecular formula C6H5ClO3S and molecular weight 192.620 g/mol.
Is 4-Chlorobenzenesulfonic acid hazardous?
4-Chlorobenzenesulfonic acid has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of 4-Chlorobenzenesulfonic acid?
For 4-Chlorobenzenesulfonic acid, Upstream Products: 4-Chlorothiophenol, 4-Chlorobenzenesulfonamide, bis(4-chlorophenyl) disulfide; Downstream Products: 2-Chlorobenzenesulfonic acid, 3-Chlorobenzenesulfonic acid, 4-Chloro-3-nitrobenzenesulfonic acid.
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-Chlorobenzenesulfonic acid (CAS 98-66-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44849-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.