3-Methyl-5-nitropyridin-2(1H)-one
Also known as: 2-Hydroxy-3-methyl-5-nitropyridine, 2-Hydroxy-5-nitro-3-picoline, 2-Hydroxy-5-nitro-3-methylpyridine, 3-Methyl-5-nitro-2-pyridone, 3-Methyl-5-nitro-2-pyridinol, 3-Methyl-5-nitropyridin-2-ol, 6-Hydroxy-5-methyl-3-nitropyridine
3-Methyl-5-nitropyridin-2(1H)-one (CAS 21901-34-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H6N2O3 and a molecular weight of 154.123 g/mol. Key properties include a melting point of 230-234 °C, a boiling point of 412.7±45.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 203.4±28.7 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21901-34-8
- Jingsj CID
- J-26298-6
- Molecular Formula
- C6H6N2O3
- Molecular Weight
- 154.123 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 230-234 °C |
|---|---|
| Boiling Point | 412.7±45.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 203.4±28.7 °C |
| Exact Mass | 154.037842 |
| PSA | 78.94000 |
| LogP | 0.01 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.605 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H318 — Causes serious eye damage
- H335 — May cause respiratory irritation
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-Methyl-5-nitropyridin-2(1H)-one?
The CAS number of 3-Methyl-5-nitropyridin-2(1H)-one is 21901-34-8.
What are the molecular formula and molecular weight of 3-Methyl-5-nitropyridin-2(1H)-one?
3-Methyl-5-nitropyridin-2(1H)-one has molecular formula C6H6N2O3 and molecular weight 154.123 g/mol.
Is 3-Methyl-5-nitropyridin-2(1H)-one hazardous?
3-Methyl-5-nitropyridin-2(1H)-one has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H318 — Causes serious eye damage.
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-5-nitropyridin-2(1H)-one (CAS 21901-34-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26298-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.