Thymine
Also known as: 5-Methyluracil, 2,4-Dihydroxy-5-methylpyrimidine, 5-Methylpyrimidine-2,4(1H,3H)-dione, 2,4(1H,3H)-Pyrimidinedione, 5-methyl-
Thymine (CAS 65-71-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H6N2O2 and a molecular weight of 126.113 g/mol. Key properties include a melting point of 316 °C, a boiling point of 403.8±37.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 198.0±26.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 65-71-4
- Jingsj CID
- J-3298-4
- Molecular Formula
- C5H6N2O2
- Molecular Weight
- 126.113 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 316 °C |
|---|---|
| Boiling Point | 403.8±37.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 198.0±26.5 °C |
| Exact Mass | 126.042931 |
| PSA | 65.72000 |
| LogP | -2.09 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.614 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Tuchman M, et al. Effects of uridine and thymidine on the degradation of 5-fluorouracil, uracil, and thymine by rat liver dihydropyrimidine dehydrogenase. Cancer Res. 1985 Nov;45(11 Pt 1):5553-6. |
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 Thymine?
The CAS number of Thymine is 65-71-4.
What are the molecular formula and molecular weight of Thymine?
Thymine has molecular formula C5H6N2O2 and molecular weight 126.113 g/mol.
What are the upstream and downstream products of Thymine?
For Thymine, Upstream Products: 2,2'-Anhydro-5-methyluridine, Thiothymine, 2-Amino-5-methylpyrimidin-4(3H)-one; Downstream Products: 5-Hydroxymethyluracil, 5-Methylpyrimidine-2,4,6(1H,3H,5H)-trione, 5,6-Dihydro-5-methyluracil.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Thymine (CAS 65-71-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3298-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.