7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine
7-羟基-5-甲基[1,2,4]三唑并[1,5-a]嘧啶
Also known as: 5-Methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol, 7-Hydroxy-5-methyl-1,3,4-triazaindolizine, 5-Methyl-7-hydroxy-1,3,4-triazaindolizine, Triazaindolizine, 5-Methyl-s-triazolo[1,5-a]pyrimidin-7-ol, 4-Hydroxy-6-methyl-1,3,3a,7-tetraazaindene, Methyl hydroxytriazaindolizine, Trapidil intermediate product
7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine (CAS 2503-56-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H6N4O and a molecular weight of 150.13800 g/mol. It is also known as 5-Methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol, 7-Hydroxy-5-methyl-1,3,4-triazaindolizine and 5-Methyl-7-hydroxy-1,3,4-triazaindolizine. Key properties include a melting point of 280-283 °C(lit.) and a density of 1.424g/cm3. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2503-56-2
- Jingsj CID
- J-3683-0
- Molecular Formula
- C6H6N4O
- Chinese Name
- 7-羟基-5-甲基[1,2,4]三唑并[1,5-a]嘧啶
- Molecular Weight
- 150.13800 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 280-283 °C(lit.) |
|---|---|
| Density | 1.424g/cm3 |
| Exact Mass | 150.05400 |
| PSA | 63.31000 |
| LogP | 0.13830 |
| Refractive Index | 1.699 |
| Additional Property | INSOLUBLE IN COLD WATER |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
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 7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine?
The CAS number of 7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine is 2503-56-2.
What are the molecular formula and molecular weight of 7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine?
7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine has molecular formula C6H6N4O and molecular weight 150.13800 g/mol.
Is 7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine hazardous?
7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine?
For 7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine, Upstream Products: Ethyl acetoacetate, Amitrole; Downstream Products: 7-chloro-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidine.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine (CAS 2503-56-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3683-0 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.