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4-Phenyl-1H-pyrazol-3-amine

Also known as: 3-Amino-4-phenyl-1H-pyrazole, 3-Amino-4-phenylpyrazole, 4-Phenyl-1H-pyrazol-3-ylamine, 4-Phenyl-5-pyrazolamine, 4-Phenylpyrazol-3-amine, Pyrazole, 3-amino-4-phenyl-, 3(or5)-amino-4-phenyl-1H-pyrazole, 5-Amino-4-phenyl-1H-pyrazole, SKF 1572, USAF EL-34, JR-8754, GL-0664, 5H-041, MFCD01693715, ZINC00169443, ZINC04234984, SMR000309623

4-Phenyl-1H-pyrazol-3-amine (CAS 5591-70-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H9N3 and a molecular weight of 159.18800 g/mol. Key properties include a melting point of 170-173 ℃, a boiling point of 394.4ºC at 760mmHg, a density of 1.238g/cm3 and a flash point of 220.9ºC. 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.
5591-70-8
Jingsj CID
J-47145-4
Molecular Formula
C9H9N3
Molecular Weight
159.18800 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026
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Physicochemical Properties

Melting Point170-173 ℃
Boiling Point394.4ºC at 760mmHg
Density1.238g/cm3
Flash Point220.9ºC
Exact Mass159.08000
PSA54.70000
LogP2.24010

GHS Safety & Compliance

IrritantSignal word: Warning
  • H302 — Harmful if swallowed
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 4-Phenyl-1H-pyrazol-3-amine?

The CAS number of 4-Phenyl-1H-pyrazol-3-amine is 5591-70-8.

What are the molecular formula and molecular weight of 4-Phenyl-1H-pyrazol-3-amine?

4-Phenyl-1H-pyrazol-3-amine has molecular formula C9H9N3 and molecular weight 159.18800 g/mol.

Is 4-Phenyl-1H-pyrazol-3-amine hazardous?

4-Phenyl-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 4-Phenyl-1H-pyrazol-3-amine?

For 4-Phenyl-1H-pyrazol-3-amine, Upstream Products: 2-Formyl-2-phenylacetonitrile, Benzoyl cyanide, 2-Phenylpropionitrile.

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-Phenyl-1H-pyrazol-3-amine (CAS 5591-70-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47145-4 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.