2-Methyl-4-isothiazolin-3-one CAS 2682-20-4
Chemical Name: Methylisothiazolinone
Synonymous Names: MIT; MI; 2-Methyl-4-isothiazolin-3-one; 2-Methyl-3(2H)-isothiazolone
CAS No.: 2682-20-4
Active Content: 50%
Molecular Formula: C4H5NOS
Molecular Weight: 115.16 g/mol
EINECS Number: 220-239-6
Type: Industrial Preservative Grade
Foconsci’s Methylisothiazolinone (MIT) is a water-based preservative used to control bacteria, fungi and other microorganisms in industrial formulations.
We supply MIT aqueous solution 50% (MIT-50). This grade suits water-based coatings, polymer emulsions, adhesives, process fluids and other products that need microbial protection during storage and use.
Structural formula:
Product Specification
| Item | Specification |
| Product Name | Methylisothiazolinone MIT 50% |
| CAS Number | 2682-20-4 |
| MIT Active Content | 49.5–50.5% |
| Appearance | Colorless to pale yellow transparent liquid |
| pH | 3.0–7.0 |
| Density | ≥1.10 g/mL |
| CMIT | ≤100 ppm |
Applications of Methylisothiazolinone
Water-Based Paints and Coatings: MIT helps control bacterial and fungal growth in water-based paints, coatings and similar formulations during storage.
Polymer Emulsions and Adhesives: MIT protects synthetic polymer emulsions, latex systems and water-based adhesives from microbial contamination.
Industrial Water and Process Fluids: MIT can be used in industrial water systems and process fluids where microbial growth can cause slime, odor or product deterioration.
Detergents and Household Formulations: MIT can also preserve water-based detergent and cleaning formulations.
Packaging and Storage
Our Methylisothiazolinone is packed in 25 kg or 200 kg plastic drum.
Keep MIT-50 in its original sealed container and protect it from direct sunlight and excessive heat.
Avoid contamination with reducing agents, strong alkalis and other materials that may reduce preservative stability.








