4-Methylthiophene-2-carboxylic acid
Also known as: 4-Methyl-2-thiophenecarboxylic acid, 2-Carboxy-4-methylthiophene, 4-Methyl-2-thenoic acid, 5-Methylthiophene-2-carboxylic acid, 5-Methyl-2-thiophenecarboxylic acid
4-Methylthiophene-2-carboxylic acid (CAS 14282-78-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H6O2S and a molecular weight of 142.176 g/mol. Key properties include a melting point of 122-126 °C(lit.), a boiling point of 277.2±20.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 121.5±21.8 °C. It is classified under GHS with signal word Warning and hazard statements H317 — May cause an allergic skin reaction and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 14282-78-1
- Jingsj CID
- J-12861-0
- Molecular Formula
- C6H6O2S
- Molecular Weight
- 142.176 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 122-126 °C(lit.) |
|---|---|
| Boiling Point | 277.2±20.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 121.5±21.8 °C |
| Exact Mass | 142.008850 |
| PSA | 65.54000 |
| LogP | 2.03 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.591 |
GHS Safety & Compliance
- H317 — May cause an allergic skin reaction
- H319 — Causes serious eye 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-Methylthiophene-2-carboxylic acid?
The CAS number of 4-Methylthiophene-2-carboxylic acid is 14282-78-1.
What are the molecular formula and molecular weight of 4-Methylthiophene-2-carboxylic acid?
4-Methylthiophene-2-carboxylic acid has molecular formula C6H6O2S and molecular weight 142.176 g/mol.
Is 4-Methylthiophene-2-carboxylic acid hazardous?
4-Methylthiophene-2-carboxylic acid has GHS signal word Warning and hazard statements H317 — May cause an allergic skin reaction; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 4-Methylthiophene-2-carboxylic acid?
For 4-Methylthiophene-2-carboxylic acid, Upstream Products: Carbon dioxide, 3-Methylthiophene, Methyl 4-methylthiophene-2-carboxylate; Downstream Products: 4-methylthiophene-2-carbonyl chloride, 5-bromo-3-methylthiophene-2-carboxylic acid, 2-isocyanato-4-methylthiophene.
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-Methylthiophene-2-carboxylic acid (CAS 14282-78-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-12861-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.