4,7-Dichloro-1H-imidazo[4,5-d]pyridazine

Also known as: 4,7-Dichlor-1H-imidazo[4,5-d]pyridazin, 4,7-Dichlor-imidazo[4.5-d]pyridazin, RW2890, 1H-Imidazo[4,5-d]pyridazine, 4,7-dichloro-

4,7-Dichloro-1H-imidazo[4,5-d]pyridazine (CAS 17998-43-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H2Cl2N4 and a molecular weight of 189.00200 g/mol. Key properties include a boiling point of 605.9ºC at 760 mmHg, a density of 1.792g/cm3 and a flash point of 347.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 17998-43-5
Jingsj CID: J-1499904-3
Molecular Formula: C₅H₂Cl₂N₄
Molecular Weight: 189.00200 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	605.9ºC at 760 mmHg
Density	1.792g/cm3
Flash Point	347.1ºC
Exact Mass	187.96600
PSA	54.46000
LogP	1.65970
Vapor Pressure	5.55E-14mmHg at 25°C
Refractive Index	1.741

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 4,7-Dichloro-1H-imidazo[4,5-d]pyridazine?

The CAS number of 4,7-Dichloro-1H-imidazo[4,5-d]pyridazine is 17998-43-5.

What are the molecular formula and molecular weight of 4,7-Dichloro-1H-imidazo[4,5-d]pyridazine?

4,7-Dichloro-1H-imidazo[4,5-d]pyridazine has molecular formula C5H2Cl2N4 and molecular weight 189.00200 g/mol.

What are the upstream and downstream products of 4,7-Dichloro-1H-imidazo[4,5-d]pyridazine?

For 4,7-Dichloro-1H-imidazo[4,5-d]pyridazine, Upstream Products: 5,6-dihydro-1H-imidazo[4,5-d]pyridazine-4,7-dione, Dimethyl 4,5-imidazoledicarboxylate, N,N-Dimethylaniline.

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. "4,7-Dichloro-1H-imidazo[4,5-d]pyridazine (CAS 17998-43-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1499904-3 (accessed 2026-11-09).

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