2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one

Also known as: 2-tert-butyl-4,5-dichloropyridazin-3-one, 2-tert-butyl-4,5-dichloro-2H-pyridazin-3-one, 4,5-dichloro-2-(1,1-dimethylethyl)-3(2H)-pyridazinone, 2-tert-butyl-4,5-dichloro-2,3-dihydropyridazin-3-one, tert-butyldichloropyridazinone

2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one (CAS 84956-71-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H10Cl2N2O and a molecular weight of 221.08400 g/mol. Key properties include a melting point of 59ºC, a boiling point of 240.5±50.0ºC (760 Torr), a density of 1.32±0.1 g/cm3 (20ºC 760 Torr) and a flash point of 99.3±30.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 84956-71-8
Jingsj CID: J-1363032-8
Molecular Formula: C₈H₁₀Cl₂N₂O
Molecular Weight: 221.08400 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	59ºC
Boiling Point	240.5±50.0ºC (760 Torr)
Density	1.32±0.1 g/cm3 (20ºC 760 Torr)
Flash Point	99.3±30.1ºC
Exact Mass	220.01700
PSA	34.89000
LogP	2.30510

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 2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one?

The CAS number of 2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one is 84956-71-8.

What are the molecular formula and molecular weight of 2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one?

2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one has molecular formula C8H10Cl2N2O and molecular weight 221.08400 g/mol.

What are the upstream and downstream products of 2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one?

For 2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one, Upstream Products: 3,4-dichloro-5-hydroxy-5H-furan-2-one, tert-Butylhydrazine hydrochloride; Downstream Products: 4-Chloro-2-(1,1-dimethylethyl)-5-hydroxy-3(2H)-pyridazinone, 4-Chloro-2-(1,1-dimethylethyl)-5-mercapto-3(2H)-pyridazinone.

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. "2-(tert-Butyl)-4,5-dichloropyridazin-3(2H)-one (CAS 84956-71-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1363032-8 (accessed 2026-11-06).

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