p-Toluenesulfonyl isocyanate
Also known as: Tosyl isocyanate, 4-Methylbenzenesulfonyl isocyanate, 4-Isocyanatosulphonyltoluene, 4-Methyl-N-(oxomethylene)benzenesulfonamide, Benzenesulfonamide, N-carbonyl-4-methyl-, Benzenesulfonyl isocyanate, 4-methyl-, MFCD00002030, p-Toluenesulphonyl isocyanate
p-Toluenesulfonyl isocyanate (CAS 4083-64-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H7NO3S and a molecular weight of 197.211 g/mol. Key properties include a melting point of 5°C, a boiling point of 288.8±9.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 128.5±18.7 °C. It is classified under GHS with signal word Danger and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H331 — Toxic if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4083-64-1
- Jingsj CID
- J-8708-1
- Molecular Formula
- C8H7NO3S
- Molecular Weight
- 197.211 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 5°C |
|---|---|
| Boiling Point | 288.8±9.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 128.5±18.7 °C |
| Exact Mass | 197.014664 |
| PSA | 71.95000 |
| LogP | 2.44 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.566 |
| Additional Property | reacts |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H331 — Toxic if inhaled
- H334 — May cause allergy or asthma symptoms if inhaled
- H335 — May cause respiratory irritation
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 p-Toluenesulfonyl isocyanate?
The CAS number of p-Toluenesulfonyl isocyanate is 4083-64-1.
What are the molecular formula and molecular weight of p-Toluenesulfonyl isocyanate?
p-Toluenesulfonyl isocyanate has molecular formula C8H7NO3S and molecular weight 197.211 g/mol.
Is p-Toluenesulfonyl isocyanate hazardous?
p-Toluenesulfonyl isocyanate has GHS signal word Danger and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H331 — Toxic if inhaled.
What are the upstream and downstream products of p-Toluenesulfonyl isocyanate?
For p-Toluenesulfonyl isocyanate, Upstream Products: Chloramine-T, Ethyl N-(4-methylphenyl)sulfonylcarbamate, Methyl tosylcarbamate; Downstream Products: 6-Chlorooxazolo[4,5-b]pyridin-2(3H)-one, p-Toluenesulfonamide, Ethyl N-(4-methylphenyl)sulfonylcarbamate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "p-Toluenesulfonyl isocyanate (CAS 4083-64-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8708-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.