4-Methylisothiazole
Also known as: 4-Methyl-1,2-thiazole, 4-methyl-isothiazole, Isothiazole, 4-methyl-
4-Methylisothiazole (CAS 693-90-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H5NS and a molecular weight of 99.15420 g/mol. Key properties include a boiling point of 47.8ºC at 760 mmHg and a density of 1.121g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 693-90-3
- Jingsj CID
- J-978500-6
- Molecular Formula
- C4H5NS
- Molecular Weight
- 99.15420 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 47.8ºC at 760 mmHg |
|---|---|
| Density | 1.121g/cm3 |
| Exact Mass | 99.01430 |
| PSA | 41.13000 |
| LogP | 1.45150 |
| Refractive Index | 1.535 |
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-Methylisothiazole?
The CAS number of 4-Methylisothiazole is 693-90-3.
What are the molecular formula and molecular weight of 4-Methylisothiazole?
4-Methylisothiazole has molecular formula C4H5NS and molecular weight 99.15420 g/mol.
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-Methylisothiazole (CAS 693-90-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-978500-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.