2-Thiobarbituric acid
Also known as: 4,6-Dihydroxy-2-mercaptopyrimidine, TBA, Malonylthiourea, 4,6-Dihydroxypyrimidine-2-thiol, 2-Mercapto-4,6(1H,5H)-pyrimidinedione, 2-Thioxodihydro-4,6(1H,5H)-pyrimidinedione, 2-Thiobarbituric Acid, Thiobarbituric acid, 4,6(1H,5H)-Pyrimidinedione, dihydro-2-thioxo-
2-Thiobarbituric acid (CAS 504-17-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H4N2O2S and a molecular weight of 144.152 g/mol. Key properties include a melting point of 245 °C (dec.)(lit.), a boiling point of 463.4ºC at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 234ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 504-17-6
- Jingsj CID
- J-35831-6
- Molecular Formula
- C4H4N2O2S
- Molecular Weight
- 144.152 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 245 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 463.4ºC at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 234ºC |
| Exact Mass | 143.999344 |
| PSA | 90.29000 |
| LogP | -0.52 |
| Refractive Index | 1.645 |
| Additional Property | <6 g/L (20 ºC) |
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 2-Thiobarbituric acid?
The CAS number of 2-Thiobarbituric acid is 504-17-6.
What are the molecular formula and molecular weight of 2-Thiobarbituric acid?
2-Thiobarbituric acid has molecular formula C4H4N2O2S and molecular weight 144.152 g/mol.
What are the upstream and downstream products of 2-Thiobarbituric acid?
For 2-Thiobarbituric acid, Upstream Products: Diethyl malonate, Dimethyl malonate, 6-amino-2-sulfanylpyrimidin-4-ol; Downstream Products: 6-Hydroxy-2-(propylsulfanyl)pyrimidin-4(3H)-one, Malonic acid, 2-(Methylthio)pyrimidine-4,6(1H,5H)-dione.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Thiobarbituric acid (CAS 504-17-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35831-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.