4-Methylthiazole-5-carboxylic acid
Also known as: 4-Methyl-1,3-thiazole-5-carboxylic acid, 4-Methyl-5-thiazolecarboxylic acid, 4-Methyl-thiazole-5-carboxylic acid, 5-Thiazolecarboxylic acid, 4-methyl-
4-Methylthiazole-5-carboxylic acid (CAS 20485-41-0) 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 143.164 g/mol. Key properties include a melting point of 287 °C (dec.)(lit.), a boiling point of 303.6±22.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 137.4±22.3 °C. It is classified under GHS with signal word Warning and hazard statements H317 — May cause an allergic skin reaction. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 20485-41-0
- Jingsj CID
- J-23346-5
- Molecular Formula
- C5H5NO2S
- Molecular Weight
- 143.164 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 287 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 303.6±22.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 137.4±22.3 °C |
| Exact Mass | 143.004105 |
| PSA | 78.43000 |
| LogP | 0.58 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.599 |
GHS Safety & Compliance
- H317 — May cause an allergic skin reaction
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 4-Methylthiazole-5-carboxylic acid?
The CAS number of 4-Methylthiazole-5-carboxylic acid is 20485-41-0.
What are the molecular formula and molecular weight of 4-Methylthiazole-5-carboxylic acid?
4-Methylthiazole-5-carboxylic acid has molecular formula C5H5NO2S and molecular weight 143.164 g/mol.
Is 4-Methylthiazole-5-carboxylic acid hazardous?
4-Methylthiazole-5-carboxylic acid has GHS signal word Warning and hazard statements H317 — May cause an allergic skin reaction.
What are the upstream and downstream products of 4-Methylthiazole-5-carboxylic acid?
For 4-Methylthiazole-5-carboxylic acid, Upstream Products: Ethyl 4-methylthiazole-5-carboxylate, (4-Methyl-1,3-thiazol-5-yl)methanol, 2-(4-Methyl-1,3-thiazol-5-yl)ethanol; Downstream Products: 4-Methyl-1,3-thiazole-5-carbonyl chloride, (4-Methyl-1,3-thiazol-5-yl)methanol, 4-Methylthiazole-5-carboxaldehyde.
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-Methylthiazole-5-carboxylic acid (CAS 20485-41-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-23346-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.