Pyrido[4,3-c]pyridazin-5(6H)-one (9CI)

Also known as: Pyrido[4,3-c]pyridazin-5(6H)-one (9CI), 6H-pyrido[4,3-c]pyridazin-5-one

Pyrido[4,3-c]pyridazin-5(6H)-one (9CI) (CAS 136411-57-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5N3O and a molecular weight of 147.13400 g/mol. Key properties include a boiling point of 547.035ºC at 760 mmHg, a density of 1.356g/cm3 and a flash point of 284.636ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 136411-57-9
Jingsj CID: J-1129154-6
Molecular Formula: C₇H₅N₃O
Molecular Weight: 147.13400 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	547.035ºC at 760 mmHg
Density	1.356g/cm3
Flash Point	284.636ºC
Exact Mass	147.04300
PSA	58.90000
LogP	0.73040
Vapor Pressure	0mmHg at 25°C
Refractive Index	1.611

Frequently Asked Questions

What is the CAS number of Pyrido[4,3-c]pyridazin-5(6H)-one (9CI)?

The CAS number of Pyrido[4,3-c]pyridazin-5(6H)-one (9CI) is 136411-57-9.

What are the molecular formula and molecular weight of Pyrido[4,3-c]pyridazin-5(6H)-one (9CI)?

Pyrido[4,3-c]pyridazin-5(6H)-one (9CI) has molecular formula C7H5N3O and molecular weight 147.13400 g/mol.

What are the upstream and downstream products of Pyrido[4,3-c]pyridazin-5(6H)-one (9CI)?

For Pyrido[4,3-c]pyridazin-5(6H)-one (9CI), Upstream Products: Ethyl 3-methylpyridazine-4-carboxylate.

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. "Pyrido[4,3-c]pyridazin-5(6H)-one (9CI) (CAS 136411-57-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1129154-6 (accessed 2026-11-09).

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