5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione

Also known as: 5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione, 5,6-dihydrothieno[2,3-d]pyridazine-4,7-quinone, 5,6-dihydrothieno[2,3-d]pyridazine-4,7-diol, Thieno[2,3-d]pyridazine-4,7-dione, 5,6-dihydro-, thieno[2,3-d]pyridazine-4,7-diol, MFCD21604255, 5,6-dihydro-thieno[2,3-d]pyridazin-4,7-dione

5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione (CAS 91533-21-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H4N2O2S and a molecular weight of 168.17300 g/mol. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 91533-21-0
Jingsj CID: J-1488471-0
Molecular Formula: C₆H₄N₂O₂S
Molecular Weight: 168.17300 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Exact Mass	167.99900
PSA	94.48000
LogP	1.10250

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. 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 5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione?

The CAS number of 5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione is 91533-21-0.

What are the molecular formula and molecular weight of 5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione?

5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione has molecular formula C6H4N2O2S and molecular weight 168.17300 g/mol.

What are the upstream and downstream products of 5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione?

For 5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione, Upstream Products: dimethyl thiophene-2,3-dicarboxylate, Thiophene-2,3-dicarboxylic acid; Downstream Products: 4,7-Dichlorothieno[2,3-d]pyridazine.

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. "5,6-Dihydrothieno[2,3-d]pyridazine-4,7-dione (CAS 91533-21-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1488471-0 (accessed 2026-11-09).

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