5-Amino-4-chloropyridazin-3(2H)-one

Also known as: 4-Amino-5-chloropyridazin-6-one, 4-AMINO-5-CHLOROPYRIDAZIN-6-ON, Desphenyl Chloridazon, Chloridazon-desphenyl, Chloridazone-desphenyl, Chloridazon Metabolite B, NSC 38293, 5-Amino-4-chloro-3(2H)-pyridazinone, 5-Amino-4-chloro-3-pyridazinone, 5-amino-4-chloro-2H-pyridazin-3-one

5-Amino-4-chloropyridazin-3(2H)-one (CAS 6339-19-1) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C4H4ClN3O and a molecular weight of 145.54700 g/mol. Key properties include a melting point of 297-300ºC (dec.) and a density of 1.798g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 6339-19-1
Jingsj CID: J-1437764-1
Molecular Formula: C₄H₄ClN₃O
Molecular Weight: 145.54700 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	297-300ºC (dec.)
Density	1.798g/cm3
Exact Mass	145.00400
PSA	71.77000
LogP	0.58670
Refractive Index	1.606
Storage Conditions	Refrigerator

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 5-Amino-4-chloropyridazin-3(2H)-one?

The CAS number of 5-Amino-4-chloropyridazin-3(2H)-one is 6339-19-1.

What are the molecular formula and molecular weight of 5-Amino-4-chloropyridazin-3(2H)-one?

5-Amino-4-chloropyridazin-3(2H)-one has molecular formula C4H4ClN3O and molecular weight 145.54700 g/mol.

What are the upstream and downstream products of 5-Amino-4-chloropyridazin-3(2H)-one?

For 5-Amino-4-chloropyridazin-3(2H)-one, Upstream Products: 4,5-Dichloro-3(2H)-pyridazinone; Downstream Products: 5-aminopyridazin-3(2H)-one, 5,6-Dichloropyridazin-4-amine.

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. "5-Amino-4-chloropyridazin-3(2H)-one (CAS 6339-19-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1437764-1 (accessed 2026-11-09).

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