4-Iodo-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one
4-碘-1,5-二甲基-2-苯基-1H-吡唑-3(2H)-酮
Also known as: Iodoantipyrine, 4-Iodoantipyrine, 4-Iodophenazone, 1,2-Dihydro-4-iodo-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one
4-Iodo-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one (CAS 129-81-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H11IN2O and a molecular weight of 314.12200 g/mol. It is also known as Iodoantipyrine, 4-Iodoantipyrine and 4-Iodophenazone. Key properties include a melting point of 161-163°C, a boiling point of 325.9ºC at 760mmHg, a density of 1.77g/cm3 and a flash point of 150.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 129-81-7
- Jingsj CID
- J-26267-3
- Molecular Formula
- C11H11IN2O
- Chinese Name
- 4-碘-1,5-二甲基-2-苯基-1H-吡唑-3(2H)-酮
- Molecular Weight
- 314.12200 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 161-163°C |
|---|---|
| Boiling Point | 325.9ºC at 760mmHg |
| Density | 1.77g/cm3 |
| Flash Point | 150.9ºC |
Frequently Asked Questions
What is the CAS number of 4-Iodo-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one?
The CAS number of 4-Iodo-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one is 129-81-7.
What are the molecular formula and molecular weight of 4-Iodo-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one?
4-Iodo-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one has molecular formula C11H11IN2O and molecular weight 314.12200 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Iodo-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one (CAS 129-81-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26267-3 (accessed 2026-10-24).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.