Benzo[1,2-b:4,5-b']dithiophene-4,8-dione

Also known as: 4,8-Dihydrobenzo[1,2-b:4,5-b']dithiophene-4,8-dione, Thieno[2,3-f][1]benzothiophene-4,8-dione, NSC 149690

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione (CAS 32281-36-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H4O2S2 and a molecular weight of 220.268 g/mol. Key properties include a melting point of 260-262 ºC, a boiling point of 408.0±35.0 °C at 760 mmHg, a density of 1.595 and a flash point of 200.6±25.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 32281-36-0
Jingsj CID: J-1165319-3
Molecular Formula: C₁₀H₄O₂S₂
Molecular Weight: 220.268 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	260-262 ºC
Boiling Point	408.0±35.0 °C at 760 mmHg
Density	1.595
Flash Point	200.6±25.9 °C
Exact Mass	219.965271
PSA	90.62000
LogP	2.74
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.736

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 Benzo[1,2-b:4,5-b']dithiophene-4,8-dione?

The CAS number of Benzo[1,2-b:4,5-b']dithiophene-4,8-dione is 32281-36-0.

What are the molecular formula and molecular weight of Benzo[1,2-b:4,5-b']dithiophene-4,8-dione?

Benzo[1,2-b:4,5-b']dithiophene-4,8-dione has molecular formula C10H4O2S2 and molecular weight 220.268 g/mol.

What are the upstream and downstream products of Benzo[1,2-b:4,5-b']dithiophene-4,8-dione?

For Benzo[1,2-b:4,5-b']dithiophene-4,8-dione, Upstream Products: 3-Thiophenecarboxaldehyde, N,N-Diethylthiophene-3-carboxamide, N,N-dimethylthiophene-3-carboxamide; Downstream Products: 4,8-Bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene, 1,1'-[4,8-Bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl]bis[1,1,1-trimethylstannane].

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. "Benzo[1,2-b:4,5-b']dithiophene-4,8-dione (CAS 32281-36-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1165319-3 (accessed 2026-11-09).

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