1-(4-Methyl-1,3-thiazol-5-yl)ethanone
Also known as: 4-Methyl-5-acetylthiazole, 4-Methyl-5-acetyl thiazole, 5-Acetyl-4-methylthiazole, 1-(4-Methylthiazol-5-yl)ethanone, 1-(4-methyl-1,3-thiazol-5-yl)ethanone, Ethanone, 1-(4-methyl-5-thiazolyl)-, 1-(4-methylthiazol-5-yl)ethan-1-one, 5-Acetyl-4-methyl-thiazole
1-(4-Methyl-1,3-thiazol-5-yl)ethanone (CAS 38205-55-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H7NOS and a molecular weight of 141.191 g/mol. Key properties include a boiling point of 228.6±20.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 92.0±21.8 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 38205-55-9
- Jingsj CID
- J-1153944-9
- Molecular Formula
- C6H7NOS
- Molecular Weight
- 141.191 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 228.6±20.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 92.0±21.8 °C |
| Exact Mass | 141.024841 |
| PSA | 58.20000 |
| LogP | 0.35 |
| Vapor Pressure | 0.1±0.5 mmHg at 25°C |
| Refractive Index | 1.539 |
| Storage Conditions | 2-8°C |
GHS Safety & Compliance
- H302 — Harmful if swallowed
Customs & Trade Information
| HS Code | 2934100090 |
|---|---|
| Summary | 2934100090 other compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 1-(4-Methyl-1,3-thiazol-5-yl)ethanone?
The CAS number of 1-(4-Methyl-1,3-thiazol-5-yl)ethanone is 38205-55-9.
What are the molecular formula and molecular weight of 1-(4-Methyl-1,3-thiazol-5-yl)ethanone?
1-(4-Methyl-1,3-thiazol-5-yl)ethanone has molecular formula C6H7NOS and molecular weight 141.191 g/mol.
Is 1-(4-Methyl-1,3-thiazol-5-yl)ethanone hazardous?
1-(4-Methyl-1,3-thiazol-5-yl)ethanone has GHS signal word Warning and hazard statements H302 — Harmful if swallowed.
What are the upstream and downstream products of 1-(4-Methyl-1,3-thiazol-5-yl)ethanone?
For 1-(4-Methyl-1,3-thiazol-5-yl)ethanone, Upstream Products: Thioformamide, 3-Chloroacetylacetone, 5-Acetyl-2-amino-4-methylthiazole; Downstream Products: 2-(4-Methyl-1,3-thiazol-5-yl)ethanol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-(4-Methyl-1,3-thiazol-5-yl)ethanone (CAS 38205-55-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1153944-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.