3-Methylisothiazole-5-carboxylic acid
3-甲基-异噻唑-5-羧酸
Also known as: 5-Isothiazolecarboxylicacid,3-methyl-, 3-methyl-1,2-thiazole-5-carboxylic acid, 3-methyl-5-isothiazolecarboxylic acid, 5-Carboxy-3-methylisothiazole, 3-Methyl-isothiazol-5-carbonsaeure, 3-Methyl-isothiazol-carbonsaeure-(5)
3-Methylisothiazole-5-carboxylic acid (CAS 66975-83-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5NO2S and a molecular weight of 143.16400 g/mol. It is also known as 5-Isothiazolecarboxylicacid,3-methyl-, 3-methyl-1,2-thiazole-5-carboxylic acid and 3-methyl-5-isothiazolecarboxylic acid. Key properties include a boiling point of 187.8ºC at 760 mmHg, a density of 1.418g/cm3 and a flash point of 67.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 66975-83-5
- Jingsj CID
- J-1359261-7
- Molecular Formula
- C5H5NO2S
- Chinese Name
- 3-甲基-异噻唑-5-羧酸
- Molecular Weight
- 143.16400 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 187.8ºC at 760 mmHg |
|---|---|
| Density | 1.418g/cm3 |
| Flash Point | 67.4ºC |
Frequently Asked Questions
What is the CAS number of 3-Methylisothiazole-5-carboxylic acid?
The CAS number of 3-Methylisothiazole-5-carboxylic acid is 66975-83-5.
What are the molecular formula and molecular weight of 3-Methylisothiazole-5-carboxylic acid?
3-Methylisothiazole-5-carboxylic acid has molecular formula C5H5NO2S and molecular weight 143.16400 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Methylisothiazole-5-carboxylic acid (CAS 66975-83-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1359261-7 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.