5-(4-Phenoxybutoxy)psoralen

Also known as: PAP-1, 4-(4-Phenoxybutoxy)-7H-furo[3,2-g][1]benzopyran-7-one, 4-(4-Phenoxybutoxy)-7H-furo[3,2-g]chromen-7-one, 4-(4-phenoxybutoxy)furo[3,2-g]chromen-7-one, 7H-Furo[3,2-g][1]benzopyran-7-one, 4-(4-phenoxybutoxy)-

5-(4-Phenoxybutoxy)psoralen (CAS 870653-45-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C21H18O5 and a molecular weight of 350.365 g/mol. Key properties include a boiling point of 555.8±50.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 289.9±30.1 °C. It is classified under GHS with signal word Danger and hazard statements H334 — May cause allergy or asthma symptoms if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 870653-45-5
Jingsj CID: J-1962562-8
Molecular Formula: C₂₁H₁₈O₅
Molecular Weight: 350.365 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	555.8±50.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	289.9±30.1 °C
Exact Mass	350.115417
PSA	61.81000
LogP	4.56
Vapor Pressure	0.0±1.5 mmHg at 25°C
Refractive Index	1.619
Storage Conditions	2~8°C

GHS Safety & Compliance

Health HazardSignal word: Danger

H334 — May cause allergy or asthma symptoms if inhaled

Activity & Biological Data

Additional Information	[1]. Schmitz A, et al. Design of PAP-1, a selective small molecule Kv1.3 blocker, for the suppression of effector memory T cells in autoimmune diseases. Mol Pharmacol. 2005 Nov;68(5):1254-70. [2]. Pereira LE, et al. Pharmacokinetics, toxicity, and functional studies of the selective Kv1.3 channel blocker 5-(4-phenoxybutoxy)psoralen in rhesus macaques. Exp Biol Med (Maywood). 2007 Nov;232(10):1338-54.

Additional Information

[1]. Schmitz A, et al. Design of PAP-1, a selective small molecule Kv1.3 blocker, for the suppression of effector memory T cells in autoimmune diseases. Mol Pharmacol. 2005 Nov;68(5):1254-70. [2]. Pereira LE, et al. Pharmacokinetics, toxicity, and functional studies of the selective Kv1.3 channel blocker 5-(4-phenoxybutoxy)psoralen in rhesus macaques. Exp Biol Med (Maywood). 2007 Nov;232(10):1338-54.

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen 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 5-(4-Phenoxybutoxy)psoralen?

The CAS number of 5-(4-Phenoxybutoxy)psoralen is 870653-45-5.

What are the molecular formula and molecular weight of 5-(4-Phenoxybutoxy)psoralen?

5-(4-Phenoxybutoxy)psoralen has molecular formula C21H18O5 and molecular weight 350.365 g/mol.

Is 5-(4-Phenoxybutoxy)psoralen hazardous?

5-(4-Phenoxybutoxy)psoralen has GHS signal word Danger and hazard statements H334 — May cause allergy or asthma symptoms if inhaled.

What are the upstream and downstream products of 5-(4-Phenoxybutoxy)psoralen?

For 5-(4-Phenoxybutoxy)psoralen, Upstream Products: Bergaptol, (4-Bromobutoxy)benzene, Bergapten.

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-(4-Phenoxybutoxy)psoralen (CAS 870653-45-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1962562-8 (accessed 2026-11-09).

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