4,5-Dichloro-3,6-pyridazinediol

Also known as: 3(2H)-Pyridazinone, 4,5-dichloro-6-hydroxy-, 4,5-DICHLORO-3,6-PYRIDAZINEDIOL, 4,5-Dichloropyridazine-3,6-diol, 4,5-Dichlor-3,6-dihydroxy-pyridazin, 4,5-dichloro-1,2-dihydropyridazine-3,6-dione, dichloropyridazine-3,6-diol, 4,5-dichloro-1,2,3,6-tetrahydropyridazine-3,6-dione

4,5-Dichloro-3,6-pyridazinediol (CAS 6641-32-3) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C4H2Cl2N2O2 and a molecular weight of 180.97700 g/mol. Key properties include a melting point of 295ºC, a boiling point of 413.5ºC at 760 mmHg, a density of 1.76g/cm3 and a flash point of 203.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 6641-32-3
Jingsj CID: J-1117340-3
Molecular Formula: C₄H₂Cl₂N₂O₂
Molecular Weight: 180.97700 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	295ºC
Boiling Point	413.5ºC at 760 mmHg
Density	1.76g/cm3
Flash Point	203.9ºC
Exact Mass	179.94900
PSA	65.98000
LogP	0.78230
Refractive Index	1.602

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 4,5-Dichloro-3,6-pyridazinediol?

The CAS number of 4,5-Dichloro-3,6-pyridazinediol is 6641-32-3.

What are the molecular formula and molecular weight of 4,5-Dichloro-3,6-pyridazinediol?

4,5-Dichloro-3,6-pyridazinediol has molecular formula C4H2Cl2N2O2 and molecular weight 180.97700 g/mol.

What are the upstream and downstream products of 4,5-Dichloro-3,6-pyridazinediol?

For 4,5-Dichloro-3,6-pyridazinediol, Upstream Products: 2,3-Dichloromaleic anhydride.

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. "4,5-Dichloro-3,6-pyridazinediol (CAS 6641-32-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1117340-3 (accessed 2026-11-09).

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