5-Methylcytosine
Also known as: 4-Amino-2-hydroxy-5-methylpyrimidine, 4-Amino-5-methylpyrimidin-2(1H)-one, 6-amino-5-methyl-1H-pyrimidin-2-one, 2(1H)-Pyrimidinone, 4-amino-5-methyl- (9CI), Cytosine, 5-methyl-
5-Methylcytosine (CAS 554-01-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H7N3O and a molecular weight of 125.129 g/mol. Key properties include a melting point of >270ºC (>518ºCF), a boiling point of 417.3ºC at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 206.2ºC. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 554-01-8
- Jingsj CID
- J-7355-2
- Molecular Formula
- C5H7N3O
- Molecular Weight
- 125.129 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >270ºC (>518ºCF) |
|---|---|
| Boiling Point | 417.3ºC at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 206.2ºC |
| Exact Mass | 125.058914 |
| PSA | 71.77000 |
| LogP | -1.12 |
| Refractive Index | 1.651 |
Activity & Biological Data
| Additional Information | [1]. Cui X, et al. 5-Methylcytosine RNA Methylation in Arabidopsis Thaliana. Mol Plant. 2017 Nov 6;10(11):1387-1399. |
|---|
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-Methylcytosine?
The CAS number of 5-Methylcytosine is 554-01-8.
What are the molecular formula and molecular weight of 5-Methylcytosine?
5-Methylcytosine has molecular formula C5H7N3O and molecular weight 125.129 g/mol.
What are the upstream and downstream products of 5-Methylcytosine?
For 5-Methylcytosine, Upstream Products: 5-Methyl-2'-deoxycytidine, 5-Methylcytidine, Thymine; Downstream Products: Thymine, 1-[(2R,3S,4R,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-methylpyrimidine-2,4-dione, Hydroxyacetone.
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-Methylcytosine (CAS 554-01-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-7355-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.