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5-ethyl-2-thiouracil

Also known as: 5-ethyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one, 5-ethyl-2-sulfanylidene-1,2,3,4-tetrahydropyrimidin-4-one, 5-ethyl-2-sulfanylidene-1H-pyrimidin-4-one, 5-ethyl-2-thioxo-2,3-dihydro-1H-pyrimidin-4-one, 5-ethyl-2-thioxo-2,3-dihydro-4(1H)-pyrimidinone, 2-thio-5-ethyl-uracil, 4(1H)-pyrimidinone, 5-ethyl-2,3-dihydro-2-thioxo-, 5-ethyl-2-thiouracil USP/EP/BP

5-ethyl-2-thiouracil (CAS 34171-37-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H8N2OS and a molecular weight of 156.20600 g/mol. Key property: a melting point of 191-193℃. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
34171-37-4
Jingsj CID
J-1500993-5
Molecular Formula
C6H8N2OS
Molecular Weight
156.20600 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026
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Physicochemical Properties

Melting Point191-193℃
Exact Mass156.03600
PSA80.74000
LogP0.99490

Customs & Trade Information

HS Code2933599090
Summary2933599090. other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure. 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-ethyl-2-thiouracil?

The CAS number of 5-ethyl-2-thiouracil is 34171-37-4.

What are the molecular formula and molecular weight of 5-ethyl-2-thiouracil?

5-ethyl-2-thiouracil has molecular formula C6H8N2OS and molecular weight 156.20600 g/mol.

What are the upstream and downstream products of 5-ethyl-2-thiouracil?

For 5-ethyl-2-thiouracil, Upstream Products: ethyl butyrate, Ethyl formate, methyl formate; Downstream Products: 5-Ethyluracil, 5-ethylpyrimidin-4-ol, 2,4-Dichloro-5-ethylpyrimidine.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "5-ethyl-2-thiouracil (CAS 34171-37-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1500993-5 (accessed 2026-11-09).

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