HomeProducts

Methimazole

CAS Number
60-56-0
EC Number
200-482-4
Chemical Formula
C4H6N2S
Molecular Weight
114.17 g/mol

Description

Methimazole (CAS 60-56-0 ), also known by the trade name Tapazole and abbreviated as MMI, is an active pharmaceutical ingredient and synthesis intermediate used across pharmaceutical manufacturing and select industrial processes. It functions as a thyroid hormone synthesis inhibitor in drug formulations and as a stabilizing agent in industrial chemical applications. In pharmaceutical manufacturing, MMI is the active substance in antithyroid drug products. This makes it a direct procurement target for API suppliers and finished-dose formulators. Textile and leather processors source it as a corrosion inhibitor and stabilizing additive in processing baths where metal ion control is critical. In paper manufacturing, it is applied as a biocide and preservation agent to extend the service life of process fluids. MMI also serves as a building block in heterocyclic synthesis for chemical production. Its reactive thione group supports the production of more complex pharmaceutical intermediates. Methimazole is supplied as a white crystalline powder in bulk quantities suited to both pharmaceutical and industrial procurement. Pharmaceutical-grade material is available to USP and BP specifications, supporting API and formulation manufacturing requirements. Technical-grade material is available for industrial applications. Contact us for supply of Methimazole Request Quote

Other Names (Synonyms)

1-methylimidazole-2(3H)-thione | 1-methyl-1,3-dihydro-2H-imidazole-2-thione | Tapazole | 1-Methyl-1H-imidazole-2-thiol | 1-Methylimidazole-2-thiol | Mercazole | Thiamazol | 2H-Imidazole-2-thione, 1,3-dihydro-1-methyl- | MMI

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point146-148 °C
Boiling Point280 °C
Density1.35 g/cm³
Flash Point280°C
AppearanceWhite Solid
ColorWhite to slightly cream or pale buff
FormCrystalline Powder
Water Solubilitysoluble
Refractive Index1.5000 (estimate)

Safety & Handling

Warning
GHS07· IrritantGHS08· Health Hazard

Hazard Statements

H302
H302
H317
H317
H361H361

Precautionary Statements

P203
P203
P261
P261
P264
P264
P270
P270
P272
P272
P280
P280
P318
P318
P321
P321
P330
P330
P405
P405
P501
P501
P317
P317
P352
P352
P317
P317
P364

Trade & Regulatory

HS Code29332990
Storage Class11 - Combustible Solids
WGK (Germany)3