5-Iodo-1-methyl-1H-pyrazole
Also known as: 1-Methyl-5-iodopyrazole, 5-Iodo-1-methylpyrazole, 1H-Pyrazole, 5-iodo-1-methyl-
5-Iodo-1-methyl-1H-pyrazole (CAS 34091-51-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H5IN2 and a molecular weight of 208.000 g/mol. Key properties include a melting point of 78 °C, a boiling point of 226.9±13.0 °C at 760 mmHg, a density of 2.1±0.1 g/cm3 and a flash point of 91.1±19.8 °C. It is classified under GHS with signal word Danger and hazard statements H315 — Causes skin irritation, H318 — Causes serious eye damage and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 34091-51-5
- Jingsj CID
- J-1067942-2
- Molecular Formula
- C4H5IN2
- Molecular Weight
- 208.000 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 78 °C |
|---|---|
| Boiling Point | 226.9±13.0 °C at 760 mmHg |
| Density | 2.1±0.1 g/cm3 |
| Flash Point | 91.1±19.8 °C |
| Exact Mass | 207.949738 |
| PSA | 17.82000 |
| LogP | 1.50 |
| Vapor Pressure | 0.1±0.4 mmHg at 25°C |
| Refractive Index | 1.681 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H318 — Causes serious eye damage
- H335 — May cause respiratory irritation
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 5-Iodo-1-methyl-1H-pyrazole?
The CAS number of 5-Iodo-1-methyl-1H-pyrazole is 34091-51-5.
What are the molecular formula and molecular weight of 5-Iodo-1-methyl-1H-pyrazole?
5-Iodo-1-methyl-1H-pyrazole has molecular formula C4H5IN2 and molecular weight 208.000 g/mol.
Is 5-Iodo-1-methyl-1H-pyrazole hazardous?
5-Iodo-1-methyl-1H-pyrazole has GHS signal word Danger and hazard statements H315 — Causes skin irritation; H318 — Causes serious eye damage; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 5-Iodo-1-methyl-1H-pyrazole?
For 5-Iodo-1-methyl-1H-pyrazole, Upstream Products: 1-Methylpyrazole; Downstream Products: 1-Methyl-5-phenyl-1H-pyrazole, 1-Methyl-5-(thiophen-2-yl)-1H-pyrazole, 2-(1-Methyl-1H-pyrazol-5-yl)pyridine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Iodo-1-methyl-1H-pyrazole (CAS 34091-51-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1067942-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.