4-Bromo-3-methyl-1H-pyrazole
Also known as: 4-Bromo-3-methylpyrazole, 3-Methyl-4-bromopyrazole, 1H-Pyrazole, 4-bromo-3-methyl-
4-Bromo-3-methyl-1H-pyrazole (CAS 13808-64-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H5BrN2 and a molecular weight of 161.000 g/mol. Key properties include a melting point of 77-79°C, a boiling point of 259.9±20.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 111.0±21.8 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 13808-64-5
- Jingsj CID
- J-39228-9
- Molecular Formula
- C4H5BrN2
- Molecular Weight
- 161.000 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 77-79°C |
|---|---|
| Boiling Point | 259.9±20.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 111.0±21.8 °C |
| Exact Mass | 159.963608 |
| PSA | 28.68000 |
| LogP | 1.90 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.584 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- 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 4-Bromo-3-methyl-1H-pyrazole?
The CAS number of 4-Bromo-3-methyl-1H-pyrazole is 13808-64-5.
What are the molecular formula and molecular weight of 4-Bromo-3-methyl-1H-pyrazole?
4-Bromo-3-methyl-1H-pyrazole has molecular formula C4H5BrN2 and molecular weight 161.000 g/mol.
Is 4-Bromo-3-methyl-1H-pyrazole hazardous?
4-Bromo-3-methyl-1H-pyrazole has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 4-Bromo-3-methyl-1H-pyrazole?
For 4-Bromo-3-methyl-1H-pyrazole, Upstream Products: 3-Methylpyrazole; Downstream Products: 4-Bromo-1-methyl-1H-pyrazole-5-carboxylic acid, 4-bromo-1,3-dimethyl-1H-pyrazole, 4-Bromo-1,5-dimethyl-1H-pyrazole.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Bromo-3-methyl-1H-pyrazole (CAS 13808-64-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-39228-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.