Thieno[3,2-d]pyrimidine-2,4-diol

Also known as: 1,3-Dihydrothieno[3,2-d]pyrimidine-2,4-dione, Thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione, 1H-Thieno[3,2-d]pyrimidine-2,4-dione, 2,4-Dihydroxythieno[3,2-d]pyrimidine, Thieno[3,2-d]pyrimidine-2,4-diol, hieno[3,2-d]pyrimidine-2,4-diol

Thieno[3,2-d]pyrimidine-2,4-diol (CAS 16233-51-5) 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 168.173 g/mol. Key properties include a melting point of 102.9°C, a boiling point of 274.804ºC at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 119.997ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 16233-51-5
Jingsj CID: J-21312-7
Molecular Formula: C₆H₄N₂O₂S
Molecular Weight: 168.173 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	102.9°C
Boiling Point	274.804ºC at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	119.997ºC
Exact Mass	167.999344
PSA	94.48000
LogP	0.23
Vapor Pressure	0.009mmHg at 25°C
Refractive Index	1.625

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 Thieno[3,2-d]pyrimidine-2,4-diol?

The CAS number of Thieno[3,2-d]pyrimidine-2,4-diol is 16233-51-5.

What are the molecular formula and molecular weight of Thieno[3,2-d]pyrimidine-2,4-diol?

Thieno[3,2-d]pyrimidine-2,4-diol has molecular formula C6H4N2O2S and molecular weight 168.173 g/mol.

What are the upstream and downstream products of Thieno[3,2-d]pyrimidine-2,4-diol?

For Thieno[3,2-d]pyrimidine-2,4-diol, Upstream Products: Methyl 3-aminothiophene-2-carboxylate, Urea, Sodium cyanate; Downstream Products: 7-bromo-2,4-dichlorothieno[3,2-d]pyrimidine, 2-Chloro-4-morpholinothieno[3,2-d]pyrimidine-6-carbaldehyde, 2-(1H-Indazol-4-yl)-6-[[4-(methylsulfonyl)-1-piperazinyl]methyl]-4-(4-morpholinyl)thieno[3,2-d]pyrimidine.

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. "Thieno[3,2-d]pyrimidine-2,4-diol (CAS 16233-51-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-21312-7 (accessed 2026-11-09).

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