1,2-benzisothiazole-3-carboxylic acid
Also known as: 1,2-benzothiazole-3-carboxylic acid, 3-carboxy-1,2-benzisothiazole, benzo[d]isothiazole-3-carboxylic acid, acido 3-benzisotiazolcarbossilic, acido 1,2-benzisotiazol-3-ilcarbossilico, benzisothiazole-3-carboxylic acid
1,2-benzisothiazole-3-carboxylic acid (CAS 40991-34-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H5NO2S and a molecular weight of 179.19600 g/mol. Key properties include a boiling point of 279.7ºC at 760 mmHg, a density of 1.508g/cm3 and a flash point of 122.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 40991-34-2
- Jingsj CID
- J-1146294-5
- Molecular Formula
- C8H5NO2S
- Molecular Weight
- 179.19600 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 279.7ºC at 760 mmHg |
|---|---|
| Density | 1.508g/cm3 |
| Flash Point | 122.9ºC |
| Exact Mass | 179.00400 |
| PSA | 78.43000 |
| LogP | 1.99450 |
| Refractive Index | 1.731 |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 1,2-benzisothiazole-3-carboxylic acid?
The CAS number of 1,2-benzisothiazole-3-carboxylic acid is 40991-34-2.
What are the molecular formula and molecular weight of 1,2-benzisothiazole-3-carboxylic acid?
1,2-benzisothiazole-3-carboxylic acid has molecular formula C8H5NO2S and molecular weight 179.19600 g/mol.
What are the upstream and downstream products of 1,2-benzisothiazole-3-carboxylic acid?
For 1,2-benzisothiazole-3-carboxylic acid, Upstream Products: benzo[d]isothiazole-3-carboxamide, Benzo[b]thiophene-2,3-dione; Downstream Products: 5-Bromo-benzo[d]isothiazole-3-carboxylic 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. "1,2-benzisothiazole-3-carboxylic acid (CAS 40991-34-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1146294-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.