3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
Also known as: 1-(4-Sulfophenyl)-3-methyl-5-pyrazolone, 1-(4-Sulphophenyl)-3-methyl-5-pyrazolone, 1-(4-Sulfonphenyl)-3-methyl-5-pyrazolone, 1-(p-Sulfophenyl)-3-methyl-5-pyrazolone, 4-(3-Methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid, 4-(3-Methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid, PSMP, SPMP, Pyrazolone G, 4-Pyrazolic acid, Phenylmethylpyrazole-4-acid
3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one (CAS 89-36-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H10N2O4S and a molecular weight of 254.262 g/mol. Key properties include a melting point of >252 °C (dec.)(lit.), a boiling point of 477ºC and a density of 1.5±0.1 g/cm3. 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.
- 89-36-1
- Jingsj CID
- J-1993260-6
- Molecular Formula
- C10H10N2O4S
- Molecular Weight
- 254.262 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >252 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 477ºC |
| Density | 1.5±0.1 g/cm3 |
| Exact Mass | 254.036133 |
| PSA | 95.42000 |
| LogP | -1.31 |
| Refractive Index | 1.667 |
| Additional Property | 5 g/L (20 ºC) |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2933199090 |
|---|---|
| Summary | 2933199090. other compounds containing an unfused pyrazole 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-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one?
The CAS number of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one is 89-36-1.
What are the molecular formula and molecular weight of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one?
3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one has molecular formula C10H10N2O4S and molecular weight 254.262 g/mol.
Is 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one hazardous?
3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one 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-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one?
For 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one, Upstream Products: Ethyl acetoacetate, 4-Hydrazinobenzenesulfonic acid; Downstream Products: Benzenesulfonic acid, 4-[4-[[4-(dimethylamino)phenyl]methylene]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-, sodium salt.
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-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one (CAS 89-36-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993260-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.