Thiothymine
Also known as: 5-Methyl-2-thiouracil, 2-Mercapto-5-methylpyrimidin-4-ol, 4-Hydroxy-5-methyl-2-mercaptopyrimidine, 2,3-Dihydro-5-methyl-2-thioxo-4(1H)-pyrimidinone, 5-Methyl-2-sulfanylpyrimidin-4-ol, 5-Methyl-2-sulfanylidene-1H-pyrimidin-4-one, 2-Thiothymine, 4(1H)-Pyrimidinone, 2,3-dihydro-5-methyl-2-thioxo-
Thiothymine (CAS 636-26-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H6N2OS and a molecular weight of 142.179 g/mol. Key properties include a melting point of 283-286°C, a boiling point of 329.7ºC at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 153.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 636-26-0
- Jingsj CID
- J-37524-6
- Molecular Formula
- C5H6N2OS
- Molecular Weight
- 142.179 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 283-286°C |
|---|---|
| Boiling Point | 329.7ºC at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 153.2ºC |
| Exact Mass | 142.020081 |
| PSA | 80.74000 |
| LogP | 0.31 |
| Refractive Index | 1.638 |
Customs & Trade Information
| HS Code | 2933599090 |
|---|---|
| Summary | 2933599090. 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 Thiothymine?
The CAS number of Thiothymine is 636-26-0.
What are the molecular formula and molecular weight of Thiothymine?
Thiothymine has molecular formula C5H6N2OS and molecular weight 142.179 g/mol.
What are the upstream and downstream products of Thiothymine?
For Thiothymine, Upstream Products: 1,3,5-Trimethyluracil, Ethyl 3,3-diethoxy-2-methylpropanoate; Downstream Products: 5-Methyl-2-(methylthio)pyrimidin-4(3H)-one, Thymine, 4-Hydroxy-5-methylpyrimidine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Thiothymine (CAS 636-26-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-37524-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.