3-Pyridinesulfonic acid
Also known as: 3-Pyridinesulphonic acid, 3-Pyridylsulphonic acid, 3-sulfopyridine, Pyridine-3-sulfonic acid, Pyridine-3-sulphonic acid, 3-pyridine sulfonic acid, EINECS 211-265-9, MFCD00006381
3-Pyridinesulfonic acid (CAS 636-73-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5NO3S and a molecular weight of 159.163 g/mol. Key properties include a melting point of >300 °C(lit.), a density of 1.5±0.1 g/cm3 and a flash point of > 66. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 636-73-7
- Jingsj CID
- J-6518-9
- Molecular Formula
- C5H5NO3S
- Molecular Weight
- 159.163 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300 °C(lit.) |
|---|---|
| Density | 1.5±0.1 g/cm3 |
| Flash Point | > 66 |
| Exact Mass | 158.999008 |
| PSA | 75.64000 |
| LogP | -0.62 |
| Refractive Index | 1.576 |
| Additional Property | soluble |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2933399090 |
|---|---|
| Summary | 2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. 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 3-Pyridinesulfonic acid?
The CAS number of 3-Pyridinesulfonic acid is 636-73-7.
What are the molecular formula and molecular weight of 3-Pyridinesulfonic acid?
3-Pyridinesulfonic acid has molecular formula C5H5NO3S and molecular weight 159.163 g/mol.
Is 3-Pyridinesulfonic acid hazardous?
3-Pyridinesulfonic acid has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of 3-Pyridinesulfonic acid?
For 3-Pyridinesulfonic acid, Upstream Products: 3-Chloropyridine 1-oxide, Pyridine, 3-Hydroxypyridine; Downstream Products: 5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-3-sulfonamide, Pyridine-3-sulfonyl chloride hydrochloride, Isothiazolo[5,4-c]pyridin-3(2H)-one 1,1-dioxide.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Pyridinesulfonic acid (CAS 636-73-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6518-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.