Sodium p-toluenesulfonate
Also known as: p-Toluenesulfonic acid sodium salt, Sodium 4-methylbenzenesulfonate, Toluene-4-sulfonic acid sodium salt, 4-Methylbenzenesulfonic acid sodium salt, Sodium p-tosylate
Sodium p-toluenesulfonate (CAS 657-84-1) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C7H8NaO3S and a molecular weight of 194.18 g/mol. Key properties include a melting point of >300°C, a boiling point of 140ºC at 20 MM HG, a density of 1.55 g/cm3 (20℃) and a flash point of 500ºC. It is classified under GHS with signal word Warning and hazard statements H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 657-84-1
- Jingsj CID
- J-12947-5
- Molecular Formula
- C7H8NaO3S
- Molecular Weight
- 194.18 g/mol
- Category
- Solvents
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300°C |
|---|---|
| Boiling Point | 140ºC at 20 MM HG |
| Density | 1.55 g/cm3 (20℃) |
| Flash Point | 500ºC |
| PSA | 62.75000 |
| LogP | 2.32250 |
| Vapor Pressure | <1 hPa (20 °C) |
| Additional Property | soluble |
GHS Safety & Compliance
- H319 — Causes serious eye irritation
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 Sodium p-toluenesulfonate?
The CAS number of Sodium p-toluenesulfonate is 657-84-1.
What are the molecular formula and molecular weight of Sodium p-toluenesulfonate?
Sodium p-toluenesulfonate has molecular formula C7H8NaO3S and molecular weight 194.18 g/mol.
Is Sodium p-toluenesulfonate hazardous?
Sodium p-toluenesulfonate has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.
What are the upstream and downstream products of Sodium p-toluenesulfonate?
For Sodium p-toluenesulfonate, Upstream Products: 5-Chloro-2-hydroxybenzophenone, 2-Chloroethyl p-toluenesulfonate, 2,2,2-Trifluoroethyl 4-methylbenzenesulfonate; Downstream Products: Sodium benzenesulfonate, 2-(p-toluenesulfonyl)acetophenone, p-Toluenesulfonylacetic 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. "Sodium p-toluenesulfonate (CAS 657-84-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-12947-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.