alpha-Quinquethiophene

Also known as: 2,2':5',2'':5'',2''':5''',2''''-Quinquethiophene, 2,5-bis(5-thiophen-2-ylthiophen-2-yl)thiophene, ALPHA-QUINQUETHIOPHENE, alpha-5T, α-Quinquethiophene

alpha-Quinquethiophene (CAS 5660-45-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C20H12S5 and a molecular weight of 412.63400 g/mol. Key properties include a melting point of 253ºC, a boiling point of 535.2ºC at 760 mmHg, a density of 1.384g/cm3 and a flash point of 210.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5660-45-7
Jingsj CID: J-34465-0
Molecular Formula: C₂₀H₁₂S₅
Molecular Weight: 412.63400 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	253ºC
Boiling Point	535.2ºC at 760 mmHg
Density	1.384g/cm3
Flash Point	210.8ºC
Exact Mass	411.95400
PSA	141.20000
LogP	8.66210
Refractive Index	1.71

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. 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 alpha-Quinquethiophene?

The CAS number of alpha-Quinquethiophene is 5660-45-7.

What are the molecular formula and molecular weight of alpha-Quinquethiophene?

alpha-Quinquethiophene has molecular formula C20H12S5 and molecular weight 412.63400 g/mol.

What are the upstream and downstream products of alpha-Quinquethiophene?

For alpha-Quinquethiophene, Upstream Products: 2-Thiopheneboronic acid, 5,5''-Dibromo-2,2':5',2''-terthiophene, 2,2'-Bithiophene.

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. "alpha-Quinquethiophene (CAS 5660-45-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-34465-0 (accessed 2026-11-09).

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