2,4-Diaminopyrimidine-5-carboxaldehyde
Also known as: 2,4-Diamino-5-pyrimidinecarboxaldehyde, 2,4-Diamino-5-formylpyrimidine, 2,4-Diaminopyrimidine-5-carbaldehyde, 2,4-Diamino-5-pyrimidinecarbaldehyde, 2,6-Diamino-5-pyrimidinecarboxaldehyde, 5-Pyrimidinecarboxaldehyde, 2,4-diamino-, NSC 211353, MFCD04973412, AURORA KA-6757
2,4-Diaminopyrimidine-5-carboxaldehyde (CAS 20781-06-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H6N4O and a molecular weight of 138.127 g/mol. Key properties include a melting point of 274-276ºC, a boiling point of 468.3±55.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 237.0±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 20781-06-0
- Jingsj CID
- J-5704-5
- Molecular Formula
- C5H6N4O
- Molecular Weight
- 138.127 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 274-276ºC |
|---|---|
| Boiling Point | 468.3±55.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 237.0±31.5 °C |
| Exact Mass | 138.054153 |
| PSA | 94.89000 |
| LogP | 0.28 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | 1.754 |
| Storage Conditions | Refrigerator |
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 2,4-Diaminopyrimidine-5-carboxaldehyde?
The CAS number of 2,4-Diaminopyrimidine-5-carboxaldehyde is 20781-06-0.
What are the molecular formula and molecular weight of 2,4-Diaminopyrimidine-5-carboxaldehyde?
2,4-Diaminopyrimidine-5-carboxaldehyde has molecular formula C5H6N4O and molecular weight 138.127 g/mol.
What are the upstream and downstream products of 2,4-Diaminopyrimidine-5-carboxaldehyde?
For 2,4-Diaminopyrimidine-5-carboxaldehyde, Upstream Products: 2,4-Diaminopyrimidine-5-carbonitrile, Formic Acid; Downstream Products: 2,4-Diamino-5-pyrimidinemethanol, 6-(2,6-Dibromophenyl)pyrido[2,3-d]pyrimidine-2,7-diamine, 6-(2,6-Dimethylphenyl)pyrido[2,3-d]pyrimidine-2,7-diamine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2,4-Diaminopyrimidine-5-carboxaldehyde (CAS 20781-06-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-5704-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.