5-Hydroxyuracil
Also known as: Isobarbituric acid, 2,4,5-Trihydroxypyrimidine, 5-Hydroxy-2,4(1H,3H)-pyrimidinedione, Pyrimidine-2,4,5-triol, 5-Hydroxy-1H-pyrimidine-2,4-dione, Fluorouracil impurity B, Fluorouracil EP impurity B, MFCD00082987
5-Hydroxyuracil (CAS 20636-41-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H4N2O3 and a molecular weight of 128.08600 g/mol. Key properties include a melting point of >300ºC (dec.)(lit.), a boiling point of 534.5ºC at 760mmHg, a density of 1.605g/cm3 and a flash point of 277ºC. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 20636-41-3
- Jingsj CID
- J-1159309-2
- Molecular Formula
- C4H4N2O3
- Molecular Weight
- 128.08600 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300ºC (dec.)(lit.) |
|---|---|
| Boiling Point | 534.5ºC at 760mmHg |
| Density | 1.605g/cm3 |
| Flash Point | 277ºC |
| Exact Mass | 128.02200 |
| PSA | 75.27000 |
| Appearance | crystalline | light yellow |
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 5-Hydroxyuracil?
The CAS number of 5-Hydroxyuracil is 20636-41-3.
What are the molecular formula and molecular weight of 5-Hydroxyuracil?
5-Hydroxyuracil has molecular formula C4H4N2O3 and molecular weight 128.08600 g/mol.
What are the upstream and downstream products of 5-Hydroxyuracil?
For 5-Hydroxyuracil, Upstream Products: Uracil, 5-Bromouracil, 5-Hydroxy-2'-deoxyuridine; Downstream Products: Oxaluric acid, N,N,N',N'-Tetramethyl-1,4-phenylenediamine.
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-Hydroxyuracil (CAS 20636-41-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1159309-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.