5-Ethyl-1H-pyrazol-3-amine
Also known as: 3-Amino-5-ethyl-1H-pyrazole, 3-Amino-5-ethylpyrazole, 5-Amino-3-ethyl-1H-pyrazole, 1H-Pyrazol-3-amine, 5-ethyl-, 3-Ethyl-1H-pyrazol-5-amine, 3-Amino-5-ethyl-2H-pyrazole, 5-Ethyl-2H-pyrazol-3-ylamine
5-Ethyl-1H-pyrazol-3-amine (CAS 1904-24-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H9N3 and a molecular weight of 111.145 g/mol. Key properties include a boiling point of 313.8±22.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 169.3±9.5 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1904-24-1
- Jingsj CID
- J-26061-7
- Molecular Formula
- C5H9N3
- Molecular Weight
- 111.145 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 313.8±22.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 169.3±9.5 °C |
| Exact Mass | 111.079643 |
| PSA | 54.70000 |
| LogP | 0.70 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.593 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- 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 5-Ethyl-1H-pyrazol-3-amine?
The CAS number of 5-Ethyl-1H-pyrazol-3-amine is 1904-24-1.
What are the molecular formula and molecular weight of 5-Ethyl-1H-pyrazol-3-amine?
5-Ethyl-1H-pyrazol-3-amine has molecular formula C5H9N3 and molecular weight 111.145 g/mol.
Is 5-Ethyl-1H-pyrazol-3-amine hazardous?
5-Ethyl-1H-pyrazol-3-amine has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 5-Ethyl-1H-pyrazol-3-amine?
For 5-Ethyl-1H-pyrazol-3-amine, Upstream Products: 3-Oxopentanenitrile, Methyl propionate, Acetonitrile.
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-Ethyl-1H-pyrazol-3-amine (CAS 1904-24-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26061-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.