4-phenylthiophene-2-carboxylic acid
Also known as: 2-carboxy-4-phenylthiophene, 2-thiophenecarboxylic acid, 4-phenyl-, 4-phenyl-2-thiophenecarboxylic acid, 4-phenylthiophene-2-carboxylic acid
4-phenylthiophene-2-carboxylic acid (CAS 21676-88-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H8O2S and a molecular weight of 204.24500 g/mol. Key properties include a melting point of 168-170ºC, a boiling point of 364.2ºC at 760mmHg and a flash point of 174.1ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21676-88-0
- Jingsj CID
- J-1179392-3
- Molecular Formula
- C11H8O2S
- Molecular Weight
- 204.24500 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 168-170ºC |
|---|---|
| Boiling Point | 364.2ºC at 760mmHg |
| Flash Point | 174.1ºC |
| Exact Mass | 204.02500 |
| PSA | 65.54000 |
| LogP | 3.11330 |
| Vapor Pressure | 6.06E-06mmHg at 25°C |
| Refractive Index | 1.635 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- 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 4-phenylthiophene-2-carboxylic acid?
The CAS number of 4-phenylthiophene-2-carboxylic acid is 21676-88-0.
What are the molecular formula and molecular weight of 4-phenylthiophene-2-carboxylic acid?
4-phenylthiophene-2-carboxylic acid has molecular formula C11H8O2S and molecular weight 204.24500 g/mol.
Is 4-phenylthiophene-2-carboxylic acid hazardous?
4-phenylthiophene-2-carboxylic acid has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 4-phenylthiophene-2-carboxylic acid?
For 4-phenylthiophene-2-carboxylic acid, Upstream Products: Methyl 4-phenylthiophene-2-carboxylate, 1-(2-Aminoethyl)-2-imidazolidinone, 3-Hydroxy-2-phenylacrylonitrile; Downstream Products: 3-Phenylthiophene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-phenylthiophene-2-carboxylic acid (CAS 21676-88-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1179392-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.