![Molecular structure of pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione (CAS 21038-66-4)](/images/chem_structures_svg/258/21038-66-4.svg)
pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione
Also known as: 1H-pyrido[2,3-d]pyrimidine-2,4-dione, pyrido[2,3-d]pyrimidine-2,4-diol, 2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine, 1,2,3,4-tetrahydro-2,4-dioxo-pyrido[2,3-d]pyrimidine, 2,8,10-triazabicyclo[4.4.0]deca-2,4,11-triene-7,9-dione
pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione (CAS 21038-66-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5N3O2 and a molecular weight of 163.133 g/mol. Key properties include a melting point of 361℃ and a density of 1.4±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21038-66-4
- Jingsj CID
- J-1341610-9
- Molecular Formula
- C7H5N3O2
- Molecular Weight
- 163.133 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 361℃ |
|---|---|
| Density | 1.4±0.1 g/cm3 |
| Exact Mass | 163.038177 |
| PSA | 78.61000 |
| LogP | -0.80 |
| Refractive Index | 1.594 |
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione?
The CAS number of pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione is 21038-66-4.
What are the molecular formula and molecular weight of pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione?
pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione has molecular formula C7H5N3O2 and molecular weight 163.133 g/mol.
What are the upstream and downstream products of pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione?
For pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione, Upstream Products: 2-Aminonicotinic acid, Urea, Potassium cyanate; Downstream Products: 2-Chloropyrido[2,3-d]pyrimidine-4(1H)-thione, 4-Chloropyrido[2,3-d]pyrimidine, 2,4-Dichloropyrido[2,3-d]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. "pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione (CAS 21038-66-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1341610-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.