2-Sulfobenzoic anhydride
Also known as: 2-Sulfobenzoic acid cyclic anhydride, 3H-2,1-Benzoxathiol-3-one 1,1-dioxide, 2,1-Benzoxathiol-3-one 1,1-dioxide, 1,1-Dioxo-2,1λ6-benzoxathiol-3-one, 3-Oxo-3H-2,1-benzoxathiole 1,1-dioxide, 2-Sulphobenzoic anhydride
2-Sulfobenzoic anhydride (CAS 81-08-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H4O4S and a molecular weight of 184.169 g/mol. Key properties include a melting point of 116-124 °C, a boiling point of 314.7±0.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 140.6±19.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 81-08-3
- Jingsj CID
- J-35895-0
- Molecular Formula
- C7H4O4S
- Molecular Weight
- 184.169 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 116-124 °C |
|---|---|
| Boiling Point | 314.7±0.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 140.6±19.3 °C |
| Exact Mass | 183.983032 |
| PSA | 68.82000 |
| LogP | 0.79 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.629 |
Customs & Trade Information
| HS Code | 29163900 |
|---|
Frequently Asked Questions
What is the CAS number of 2-Sulfobenzoic anhydride?
The CAS number of 2-Sulfobenzoic anhydride is 81-08-3.
What are the molecular formula and molecular weight of 2-Sulfobenzoic anhydride?
2-Sulfobenzoic anhydride has molecular formula C7H4O4S and molecular weight 184.169 g/mol.
What are the upstream and downstream products of 2-Sulfobenzoic anhydride?
For 2-Sulfobenzoic anhydride, Upstream Products: 2-sulfobenzoic acid monoammonium salt, 2-Sulfobenzoic acid, Saccharin; Downstream Products: Pyrogallol red, Methyl 2-(chlorosulfonyl)benzoate, Bromophenol Red.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Sulfobenzoic anhydride (CAS 81-08-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35895-0 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.