o-Toluenesulfonic acid
Also known as: 2-Methylbenzenesulfonic acid, 2-Methylbenzene-1-sulfonic acid, 2-Toluenesulfonic acid, Benzenesulfonic acid, 2-methyl-, Toluene-2-sulfonic acid, o-Methylbenzenesulfonic acid, Toluenesulfonic acid, Toluenesulphonic acid, Sorafenib Impurity 47
o-Toluenesulfonic acid (CAS 88-20-0) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C7H8O3S and a molecular weight of 172.202 g/mol. Key properties include a melting point of 67.5 °C, a boiling point of 272.52 °C and a density of 1.3±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 88-20-0
- Jingsj CID
- J-1516743-8
- Molecular Formula
- C7H8O3S
- Molecular Weight
- 172.202 g/mol
- Category
- Solvents
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 67.5 °C |
|---|---|
| Boiling Point | 272.52 °C |
| Density | 1.3±0.1 g/cm3 |
| Exact Mass | 172.019409 |
| PSA | 62.75000 |
| LogP | 0.93 |
| Refractive Index | 1.563 |
| Storage Conditions | -20°C |
Customs & Trade Information
| HS Code | 2904100000 |
|---|---|
| Summary | 2904100000 derivatives containing only sulpho groups, their salts and ethyl esters。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of o-Toluenesulfonic acid?
The CAS number of o-Toluenesulfonic acid is 88-20-0.
What are the molecular formula and molecular weight of o-Toluenesulfonic acid?
o-Toluenesulfonic acid has molecular formula C7H8O3S and molecular weight 172.202 g/mol.
What are the upstream and downstream products of o-Toluenesulfonic acid?
For o-Toluenesulfonic acid, Upstream Products: 1,2-Dichlorobenzene, o-Toluenesulfonyl chloride, 5-Bromo-2-methylbenzenesulfonic acid; Downstream Products: Mesaconic acid, Borneol, p-Toluenesulfonic 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. "o-Toluenesulfonic acid (CAS 88-20-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1516743-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.