3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one

Also known as: 3-Bromo-1H-pyrazolo[3,4-d]pyrimidin-4-ol, 3-Bromo-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one, 3-Bromo-4-hydroxypyrazolo[3,4-d]pyrimidine, 3-Bromoallopurinol, 3-bromo-1,2-dihydropyrazolo[3,4-d]pyrimidin-4-one, 4H-Pyrazolo[3,4-d]pyrimidin-4-one, 3-bromo-1,5-dihydro-, NSC 344532

3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one (CAS 54738-73-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H3BrN4O and a molecular weight of 215.008 g/mol. Key properties include a melting point of 350℃, a boiling point of 473.1±40.0 °C at 760 mmHg, a density of 2.2±0.1 g/cm3 and a flash point of 239.9±27.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 54738-73-7
Jingsj CID: J-1180688-5
Molecular Formula: C₅H₃BrN₄O
Molecular Weight: 215.008 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	350℃
Boiling Point	473.1±40.0 °C at 760 mmHg
Density	2.2±0.1 g/cm3
Flash Point	239.9±27.3 °C
Exact Mass	213.949020
PSA	74.43000
LogP	-0.26
Vapor Pressure	0.0±1.2 mmHg at 25°C
Refractive Index	1.834

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 3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one?

The CAS number of 3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one is 54738-73-7.

What are the molecular formula and molecular weight of 3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one?

3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one has molecular formula C5H3BrN4O and molecular weight 215.008 g/mol.

What are the upstream and downstream products of 3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one?

For 3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one, Upstream Products: Allopurinol; Downstream Products: 3-Bromo-4-chloro-1H-pyrazolo[3,4-d]pyrimidine.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "3-Bromo-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one (CAS 54738-73-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1180688-5 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.