4-Bromoantipyrine

Also known as: 4-Bromo-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one, 4-Bromo-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one, Bromoantipyrine, NSC 14307, 3H-Pyrazol-3-one,4-bromo-1,2-dihydro-1,5-dimethyl-2-phenyl-, 4-Bromphenazon

4-Bromoantipyrine (CAS 5426-65-3) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C11H11BrN2O and a molecular weight of 267.12200 g/mol. Key properties include a melting point of 117ºC, a boiling point of 309.3ºC at 760mmHg, a density of 1.525g/cm3 and a flash point of 140.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5426-65-3
Jingsj CID: J-1383197-5
Molecular Formula: C₁₁H₁₁BrN₂O
Molecular Weight: 267.12200 g/mol
Category: Organohalogen Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	117ºC
Boiling Point	309.3ºC at 760mmHg
Density	1.525g/cm3
Flash Point	140.8ºC
Exact Mass	266.00500
PSA	26.93000
LogP	2.24690
Refractive Index	1.63

Customs & Trade Information

HS Code	2933199090
Summary	2933199090. other compounds containing an unfused pyrazole ring (whether or not hydrogenated) 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 4-Bromoantipyrine?

The CAS number of 4-Bromoantipyrine is 5426-65-3.

What are the molecular formula and molecular weight of 4-Bromoantipyrine?

4-Bromoantipyrine has molecular formula C11H11BrN2O and molecular weight 267.12200 g/mol.

What are the upstream and downstream products of 4-Bromoantipyrine?

For 4-Bromoantipyrine, Upstream Products: Antipyrine, Cyanogen bromide, Carbon tetrachloride; Downstream Products: 4-hydroxyantipyrine.

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. "4-Bromoantipyrine (CAS 5426-65-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1383197-5 (accessed 2026-11-09).

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