Methimazole (CAS 60-56-0) is a white crystalline heterocyclic compound of the thioimidazole class, supplied as a white to slightly cream powder, that acts as an antithyroid agent by inhibiting thyroid peroxidase and is used in pharmaceuticals for hyperthyroidism and Graves' disease and in biochemical research as an enzymatic inhibitor.
Typical Properties
| Molecular formula | C4H6N2S |
|---|---|
| Molecular weight | 114.17 g/mol |
| Appearance | White Solid |
| Form | Crystalline Powder |
| Color | White to slightly cream or pale buff |
| Melting point | 146-148 °C |
| Boiling point | 280 °C |
| Density | 1.35 g/cm³ |
| Water solubility | soluble |
| Flash point | 280°C |
| GHS signal word | Warning · Irritant / harmful, Health hazard |
| HS code | 29332990 |
| Grades available | Pharma Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Methimazole
Applications
Used in pharmaceuticals to treat hyperthyroidism and Graves’ disease. Also employed in biochemical research as an enzymatic inhibitor.
Safety & Risks
Toxic in overdose; may cause skin sensitization. Use gloves and controlled environments.
Packaging
Supplied in 1–25 kg aluminum foil bags or glass bottles. Store cool, dry, and dark.