3,5-Dichlorobenzenesulfonyl chloride
Also known as: 3,5-Dichlorobenzene-1-sulfonyl chloride, 3,5-Dichlorobenzenesulphonyl chloride, Benzenesulfonyl chloride, 3,5-dichloro-, MFCD00051698, WSGR CG EG, BUTTPARK 95\57-48
3,5-Dichlorobenzenesulfonyl chloride (CAS 705-21-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H3Cl3O2S and a molecular weight of 245.511 g/mol. Key properties include a melting point of 32-35 °C(lit.), a boiling point of 334.4±32.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 156.0±25.1 °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.
- 705-21-5
- Jingsj CID
- J-8621-5
- Molecular Formula
- C6H3Cl3O2S
- Molecular Weight
- 245.511 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 32-35 °C(lit.) |
|---|---|
| Boiling Point | 334.4±32.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 156.0±25.1 °C |
| Exact Mass | 243.891937 |
| PSA | 42.52000 |
| LogP | 3.93 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.582 |
GHS Safety & Compliance
- 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 3,5-Dichlorobenzenesulfonyl chloride?
The CAS number of 3,5-Dichlorobenzenesulfonyl chloride is 705-21-5.
What are the molecular formula and molecular weight of 3,5-Dichlorobenzenesulfonyl chloride?
3,5-Dichlorobenzenesulfonyl chloride has molecular formula C6H3Cl3O2S and molecular weight 245.511 g/mol.
Is 3,5-Dichlorobenzenesulfonyl chloride hazardous?
3,5-Dichlorobenzenesulfonyl chloride has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of 3,5-Dichlorobenzenesulfonyl chloride?
For 3,5-Dichlorobenzenesulfonyl chloride, Upstream Products: Bis(3,5-dichlorophenyl) disulfide; Downstream Products: N-(3,5-Dichlorobenzenesulfonyl)-L-proline, Bis(3,5-dichlorophenyl) disulfide, 3,5-Dichlorobenzenesulfonamide.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,5-Dichlorobenzenesulfonyl chloride (CAS 705-21-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8621-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.