8-Cyclopentyl-1,3-dimethylxanthine

Also known as: 8-CYCLOPENTYL-1,3-DIMETHYLXANTHINE, 8-CYCLOPENTYLTHEOPHYLLINE, CPT, 1,3-dimethyl-8-cyclopentylxanthine, 8-cyclopentyl-3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione, 8-cyclopentyl theophylline, Theophylline,8-cyclopentyl, Xanthine,8-cyclopentyl-1,3-dimethyl, NSC 101806, PD 116600

8-Cyclopentyl-1,3-dimethylxanthine (CAS 35873-49-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H16N4O2 and a molecular weight of 248.28100 g/mol. Key properties include a melting point of 250-252ºC, a boiling point of 513.1ºC at 760mmHg, a density of 1.332g/cm3 and a flash point of 264.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 35873-49-5
Jingsj CID: J-16385-3
Molecular Formula: C₁₂H₁₆N₄O₂
Molecular Weight: 248.28100 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	250-252ºC
Boiling Point	513.1ºC at 760mmHg
Density	1.332g/cm3
Flash Point	264.1ºC
Exact Mass	248.12700
PSA	72.68000
LogP	0.61790
Refractive Index	1.607

Activity & Biological Data

Target	Ki: 10.9 nM (A1 receptor), 1440 nM (A2 receptor)[1]
Additional Information	[1]. K A Jacobson, et al. Sulfur-containing 1,3-dialkylxanthine derivatives as selective antagonists at A1-adenosine receptors. J Med Chem. 1989 Aug;32(8):1873-9.

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 8-Cyclopentyl-1,3-dimethylxanthine?

The CAS number of 8-Cyclopentyl-1,3-dimethylxanthine is 35873-49-5.

What are the molecular formula and molecular weight of 8-Cyclopentyl-1,3-dimethylxanthine?

8-Cyclopentyl-1,3-dimethylxanthine has molecular formula C12H16N4O2 and molecular weight 248.28100 g/mol.

What are the upstream and downstream products of 8-Cyclopentyl-1,3-dimethylxanthine?

For 8-Cyclopentyl-1,3-dimethylxanthine, Upstream Products: 5,6-Diamino-1,3-dimethyluracil, Cyclopentanecarboxylic acid.

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. "8-Cyclopentyl-1,3-dimethylxanthine (CAS 35873-49-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16385-3 (accessed 2026-11-07).

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