Chlorosulfonyl isocyanate
Also known as: CSI, N-Carbonylsulfamyl chloride, Sulfurisocyanatidic chloride, N-Chlorosulfonyl isocyanate, N-Chlorosulphonyl isocyanate, Isocyanatosulfuryl chloride, Sulfuryl chloride isocyanate, (Chlorosulfonyl)iminoformaldehyde
Chlorosulfonyl isocyanate (CAS 1189-71-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula CClNO3S and a molecular weight of 141.534 g/mol. Key properties include a melting point of −44 °C(lit.), a boiling point of 107.0±9.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 18.5±18.7 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H314 — Causes severe skin burns and eye damage and H334 — May cause allergy or asthma symptoms if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1189-71-5
- Jingsj CID
- J-1993922-1
- Molecular Formula
- CClNO3S
- Molecular Weight
- 141.534 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −44 °C(lit.) |
|---|---|
| Boiling Point | 107.0±9.0 °C at 760 mmHg |
| Density | 1.8±0.1 g/cm3 |
| Flash Point | 18.5±18.7 °C |
| Exact Mass | 140.928741 |
| PSA | 71.95000 |
| LogP | 1.23 |
| Vapor Pressure | 32.2±0.2 mmHg at 25°C |
| Refractive Index | 1.550 |
| Additional Property | reacts violently exothermic |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H314 — Causes severe skin burns and eye damage
- H334 — May cause allergy or asthma symptoms if inhaled
Customs & Trade Information
| HS Code | 2929109000 |
|---|---|
| Summary | 2929109000. other isocyanates. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Chlorosulfonyl isocyanate?
The CAS number of Chlorosulfonyl isocyanate is 1189-71-5.
What are the molecular formula and molecular weight of Chlorosulfonyl isocyanate?
Chlorosulfonyl isocyanate has molecular formula CClNO3S and molecular weight 141.534 g/mol.
Is Chlorosulfonyl isocyanate hazardous?
Chlorosulfonyl isocyanate has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage; H334 — May cause allergy or asthma symptoms if inhaled.
What are the upstream and downstream products of Chlorosulfonyl isocyanate?
For Chlorosulfonyl isocyanate, Upstream Products: Sulfur trioxide; Downstream Products: Methyl 3-ureidofuran-2-carboxylate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Chlorosulfonyl isocyanate (CAS 1189-71-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993922-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.