Overview
| Product Name | Isothiazolinone (MI/MIT, CMIT/MIT) |
| Chemical Category | Biocide / Antimicrobial Agent |
| Molecular Formula | Methylisothiazolinone (MIT): C₄H₅NOS Chloromethylisothiazolinone (CMIT): C₄H₄ClNOS |
| Molecular Weight | MIT: 115.15 g/mol CMIT: 149.60 g/mol |
| CAS Number | MIT: 2682-20-4 CMIT/MIT mixture: 55965-84-9 |
| Appearance | Clear to pale yellow liquid with a slight odor |
Description
Isothiazolinones are powerful, broad-spectrum antimicrobial agents widely used in industrial and consumer products to control microbial growth. They are particularly effective against bacteria, fungi, and algae. Typically available as a blend of CMIT and MIT, this biocide is used in low concentrations to preserve products and prevent microbial spoilage. It is essential in water treatment, coatings, cosmetics (in regulated amounts), and oilfield applications. The combination of CMIT/MIT exhibits strong efficacy while maintaining compatibility with various formulations.
Specifications
| Grade Type | Description | Typical Concentration (%) |
|---|---|---|
| Industrial Grade | For water treatment, paints, adhesives, emulsions | 1.5%, 2%, 5%, 14% |
| Cosmetic Grade (MIT) | Low concentration, complies with cosmetic regulations | 50 ppm – 100 ppm (in use) |
| Oilfield Grade | Enhanced stability in high-salinity, high-temp conditions | 1.5% – 14% |
| Customized Grade | Tailored concentration or CMIT:MIT ratio | As requested |
Applications
- Water Treatment: Controls microbial growth in cooling towers and process water.
- Paint & Coatings: Preservative for emulsions, paints, and adhesives.
- Cosmetics & Personal Care: Used in rinse-off products (within safe limits).
- Pulp & Paper: Prevents microbial degradation in paper and pulp processing.
- Oilfield & Industrial Systems: Biocide for injection water and drilling fluids.
Advantages
- Broad-spectrum antimicrobial activity
- Effective at low dosages
- Compatible with a wide range of formulations
- Strong resistance to microbial adaptation
- Non-volatile and easy to incorporate
Storage
Store in a cool, dry, and well-ventilated area. Keep container tightly sealed. Avoid exposure to sunlight, strong oxidizers, or high temperatures. Use protective measures when handling.
Packaging
- Standard Packing: 25kg or 250kg plastic drum, 1000L IBC tank
- Custom Packaging: Available upon request based on client needs

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