3,4-Propylenedioxythiophene-2,5-dicarboxylic acid
Also known as: 2,3-Dihydro-2H-thieno[3,4-b][1,4]dioxepin-6,8-dicarboxylic acid, 2H-Thieno[3,4-b][1,4]dioxepin-6,8-dicarboxylic acid, 3,4-dihydro-, 3,4-Dihydro-2H-thieno[3,4-b][1,4]dioxepine-6,8-dicarboxylic acid, 3,4-Propylenedioxythiophene-2,5-dicarboxylic acid 97%
3,4-Propylenedioxythiophene-2,5-dicarboxylic acid (CAS 177364-98-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H8O6S and a molecular weight of 244.22100 g/mol. Key properties include a melting point of >250ºC (dec.), a boiling point of 482.583ºC at 760 mmHg, a density of 1.621g/cm3 and a flash point of 245.658ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 177364-98-6
- Jingsj CID
- J-1391048-0
- Molecular Formula
- C9H8O6S
- Molecular Weight
- 244.22100 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >250ºC (dec.) |
|---|---|
| Boiling Point | 482.583ºC at 760 mmHg |
| Density | 1.621g/cm3 |
| Flash Point | 245.658ºC |
| Exact Mass | 244.00400 |
| PSA | 121.30000 |
| LogP | 1.30580 |
| Vapor Pressure | 0mmHg at 25°C |
| Refractive Index | 1.634 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
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 3,4-Propylenedioxythiophene-2,5-dicarboxylic acid?
The CAS number of 3,4-Propylenedioxythiophene-2,5-dicarboxylic acid is 177364-98-6.
What are the molecular formula and molecular weight of 3,4-Propylenedioxythiophene-2,5-dicarboxylic acid?
3,4-Propylenedioxythiophene-2,5-dicarboxylic acid has molecular formula C9H8O6S and molecular weight 244.22100 g/mol.
Is 3,4-Propylenedioxythiophene-2,5-dicarboxylic acid hazardous?
3,4-Propylenedioxythiophene-2,5-dicarboxylic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 3,4-Propylenedioxythiophene-2,5-dicarboxylic acid?
For 3,4-Propylenedioxythiophene-2,5-dicarboxylic acid, Upstream Products: Diethyl 3,4-dihydroxy-2,5-thiophenedicarboxylate; Downstream Products: 3,4-Propylenedioxythiophene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,4-Propylenedioxythiophene-2,5-dicarboxylic acid (CAS 177364-98-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1391048-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.