![Molecular structure of 2,5-Dibromothieno[3,2-b]thiophene (CAS 25121-87-3)](/images/chem_structures_svg/341/25121-87-3.svg)
2,5-Dibromothieno[3,2-b]thiophene
Also known as: 2,5-Dibromothieno[3,2-b]thiophene, Thieno[3,2-b]thiophene, 2,5-dibromo-, 2,5-Dibromo-1,4-dithiapentalene, BTH-2Br, TT-2Br
2,5-Dibromothieno[3,2-b]thiophene (CAS 25121-87-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H2Br2S2 and a molecular weight of 298.018 g/mol. Key properties include a melting point of 130ºC, a boiling point of 346.7±37.0 °C at 760 mmHg, a density of 2.2±0.1 g/cm3 and a flash point of 163.5±26.5 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 25121-87-3
- Jingsj CID
- J-1143211-4
- Molecular Formula
- C6H2Br2S2
- Molecular Weight
- 298.018 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 130ºC |
|---|---|
| Boiling Point | 346.7±37.0 °C at 760 mmHg |
| Density | 2.2±0.1 g/cm3 |
| Flash Point | 163.5±26.5 °C |
| Exact Mass | 295.796448 |
| PSA | 56.48000 |
| LogP | 7.45 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.774 |
| Storage Conditions | Refrigerator |
GHS Safety & Compliance
- H301 — Toxic if swallowed
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 2,5-Dibromothieno[3,2-b]thiophene?
The CAS number of 2,5-Dibromothieno[3,2-b]thiophene is 25121-87-3.
What are the molecular formula and molecular weight of 2,5-Dibromothieno[3,2-b]thiophene?
2,5-Dibromothieno[3,2-b]thiophene has molecular formula C6H2Br2S2 and molecular weight 298.018 g/mol.
Is 2,5-Dibromothieno[3,2-b]thiophene hazardous?
2,5-Dibromothieno[3,2-b]thiophene has GHS signal word Danger and hazard statements H301 — Toxic if swallowed.
What are the upstream and downstream products of 2,5-Dibromothieno[3,2-b]thiophene?
For 2,5-Dibromothieno[3,2-b]thiophene, Upstream Products: Thieno[3,2-b]thiophene, 3-Bromothiophene-2-carbaldehyde, Ethyl thieno[3,2-b]thiophene-2-carboxylate; Downstream Products: 3,6-dibromothieno[3,2-b]thiophene, 2,5-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thieno[3,2-b]thiophene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2,5-Dibromothieno[3,2-b]thiophene (CAS 25121-87-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1143211-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.