5-Methyl-2-thiophenecarboxylic acid
Also known as: 5-Methylthiophene-2-carboxylic acid, 5-Methyl-2-thenoic acid, 2-Carboxy-5-methylthiophene, 2-Methyl-5-thiophenecarboxylic acid, 2-Thiophenecarboxylic acid, 5-methyl-, 5-methylthiophene-2-carboxylic acid
5-Methyl-2-thiophenecarboxylic acid (CAS 1918-79-2) 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 135-138 °C(lit.), a boiling point of 274.7±20.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 120.0±21.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1918-79-2
- Jingsj CID
- J-33269-4
- 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 | 135-138 °C(lit.) |
|---|---|
| Boiling Point | 274.7±20.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 120.0±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 |
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 5-Methyl-2-thiophenecarboxylic acid?
The CAS number of 5-Methyl-2-thiophenecarboxylic acid is 1918-79-2.
What are the molecular formula and molecular weight of 5-Methyl-2-thiophenecarboxylic acid?
5-Methyl-2-thiophenecarboxylic acid has molecular formula C6H6O2S and molecular weight 142.176 g/mol.
What are the upstream and downstream products of 5-Methyl-2-thiophenecarboxylic acid?
For 5-Methyl-2-thiophenecarboxylic acid, Upstream Products: 2-Bromo-5-methylthiophene, 2-Methylthiophene, Carbon dioxide; Downstream Products: Methyl 5-(bromomethyl)-2-thiophenecarboxylate, 2-Methyl-3-nitrothiophene-5-carboxylic Acid, 2-Methyl-5-nitrothiophene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Methyl-2-thiophenecarboxylic acid (CAS 1918-79-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33269-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.