3(2H)-Pyridazinone

Also known as: 3-hydroxypyridazine, pyridazin-3-ol, pyridazine-3-ol, 3-pyridazinol, 2,3-dihydropyridazin-3-one, 2H-pyridazin-3-one

3(2H)-Pyridazinone (CAS 504-30-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C4H4N2O and a molecular weight of 96.087 g/mol. Key properties include a melting point of 98-104ºC, a boiling point of 315.9ºCat 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 144.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 504-30-3
Jingsj CID: J-1069938-4
Molecular Formula: C₄H₄N₂O
Molecular Weight: 96.087 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	98-104ºC
Boiling Point	315.9ºCat 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	144.9ºC
Exact Mass	96.032364
PSA	45.75000
LogP	-0.66
Refractive Index	1.596

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 3(2H)-Pyridazinone?

The CAS number of 3(2H)-Pyridazinone is 504-30-3.

What are the molecular formula and molecular weight of 3(2H)-Pyridazinone?

3(2H)-Pyridazinone has molecular formula C4H4N2O and molecular weight 96.087 g/mol.

What are the upstream and downstream products of 3(2H)-Pyridazinone?

For 3(2H)-Pyridazinone, Upstream Products: Epichlorohydrin, Allyl bromide; Downstream Products: 3-Bromopyridazine, 3-Chloropyridazine, 2-(6-Oxopyridazin-1(6H)-yl)acetic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "3(2H)-Pyridazinone (CAS 504-30-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1069938-4 (accessed 2026-11-09).

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