5-Methylthiophene-3-carboxylic acid
5-甲基噻吩-3-羧酸
Also known as: 5-Methyl-3-thiophenecarboxylic acid, 3-Thiophenecarboxylic acid, 5-methyl-, 5-Methyl-3-thenoic acid, 4-Carboxy-2-methylthiophene, 3-Carboxy-5-methylthiophene
5-Methylthiophene-3-carboxylic acid (CAS 19156-50-4) 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. It is also known as 5-Methyl-3-thiophenecarboxylic acid, 3-Thiophenecarboxylic acid, 5-methyl- and 5-Methyl-3-thenoic acid. Key properties include a melting point of 131-132 °C, 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.
- 19156-50-4
- Jingsj CID
- J-1309213-9
- Molecular Formula
- C6H6O2S
- Chinese Name
- 5-甲基噻吩-3-羧酸
- 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 | 131-132 °C |
|---|---|
| Boiling Point | 274.7±20.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 120.0±21.8 °C |
Frequently Asked Questions
What is the CAS number of 5-Methylthiophene-3-carboxylic acid?
The CAS number of 5-Methylthiophene-3-carboxylic acid is 19156-50-4.
What are the molecular formula and molecular weight of 5-Methylthiophene-3-carboxylic acid?
5-Methylthiophene-3-carboxylic acid has molecular formula C6H6O2S and molecular weight 142.176 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Methylthiophene-3-carboxylic acid (CAS 19156-50-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1309213-9 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.