5-Hydroxymethyluracil
Also known as: 5-(Hydroxymethyl)uracil, 5-(Hydroxymethyl)-2,4(1H,3H)-pyrimidinedione, 2,4(1H,3H)-Pyrimidinedione, 5-(hydroxymethyl)-, 5-(Hydroxymethyl)pyrimidine-2,4(1H,3H)-dione, α-Hydroxythymine
5-Hydroxymethyluracil (CAS 4433-40-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H6N2O3 and a molecular weight of 142.113 g/mol. Key properties include a melting point of >300 °C(lit.), a boiling point of 530.4ºC at 760mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 274.6ºC. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 4433-40-3
- Jingsj CID
- J-1994251-9
- Molecular Formula
- C5H6N2O3
- Molecular Weight
- 142.113 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300 °C(lit.) |
|---|---|
| Boiling Point | 530.4ºC at 760mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 274.6ºC |
| Exact Mass | 142.037842 |
| PSA | 86.47000 |
| LogP | -0.50 |
| Refractive Index | 1.528 |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Djuric Z, et al. Quantitation of 5-(hydroxymethyl)uracil in DNA by gas chromatography with mass spectral detection. Chem Res Toxicol. 1991 Nov-Dec;4(6):687-91. [2]. Janoušková M, et al. 5-(Hydroxymethyl)uracil and -cytosine as potential epigenetic marks enhancing or inhibiting transcription with bacterial RNA polymerase. Chem Commun (Camb). 2017 Dec 12;53(99):13253-13255. |
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-Hydroxymethyluracil?
The CAS number of 5-Hydroxymethyluracil is 4433-40-3.
What are the molecular formula and molecular weight of 5-Hydroxymethyluracil?
5-Hydroxymethyluracil has molecular formula C5H6N2O3 and molecular weight 142.113 g/mol.
What are the upstream and downstream products of 5-Hydroxymethyluracil?
For 5-Hydroxymethyluracil, Upstream Products: Formaldehyde, Uracil, Thymine; Downstream Products: 5-Hydroxymethyl-2'-deoxyuridine, Thymine, 2,4-Dichloro-5-(chloromethyl)pyrimidine.
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-Hydroxymethyluracil (CAS 4433-40-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1994251-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.