5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine

Also known as: 5-Bromo-2-chloro-4-(cyclopentylamino)pyrimidine, 5-Bromo-2-chloro-N-cyclopentyl-4-pyrimidinamine, N-(5-Bromo-2-chloropyrimidin-4-yl)(cyclopentyl)amine, 4-Pyrimidinamine, 5-bromo-2-chloro-N-cyclopentyl-, Ribociclib Intermediate 2, Palbociclib intermediate

5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine (CAS 733039-20-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H11BrClN3 and a molecular weight of 276.561 g/mol. Key properties include a boiling point of 424.0±30.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 210.2±24.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 733039-20-8
Jingsj CID: J-1019021-3
Molecular Formula: C₉H₁₁BrClN₃
Molecular Weight: 276.561 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	424.0±30.0 °C at 760 mmHg
Density	1.6±0.1 g/cm3
Flash Point	210.2±24.6 °C
Exact Mass	274.982483
PSA	37.81000
LogP	3.64
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.646

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 5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine?

The CAS number of 5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine is 733039-20-8.

What are the molecular formula and molecular weight of 5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine?

5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine has molecular formula C9H11BrClN3 and molecular weight 276.561 g/mol.

What are the upstream and downstream products of 5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine?

For 5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine, Upstream Products: 5-Bromo-2,4-dichloropyrimidine, Cyclopentylamine; Downstream Products: 2-chloro-8-cyclopentyl-5-methyl-8H-pyrido[2,3-d]pyrimidin-7-one, 1-Piperazinecarboxylic acid, 4-[6-[[5-bromo-4-(cyclopentylamino)-2-pyrimidinyl]amino]-3-pyridinyl]-, 1,1-dimethylethyl ester, 5-Bromo-N-cyclopentyl-2-(methylsulfanyl)-4-pyrimidinamine.

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. "5-Bromo-2-chloro-N-cyclopentylpyrimidin-4-amine (CAS 733039-20-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1019021-3 (accessed 2026-11-09).

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