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Highly effective broad-spectrum biocide against bacteria, fungi, and algae in water-based industrial systems.
Stable performance across a wide pH range (pH 4–9) and tolerant to common water treatment chemicals.
Low-dosage efficacy—provides long-term microbial control at concentrations as low as 5–50 ppm active ingredient.
Compatible with common polymers, surfactants, and corrosion inhibitors used in cooling water and process water applications.
Non-oxidizing mode of action minimizes impact on system metallurgy and avoids interference with residual chlorine monitoring.
Cooling water systems—including open recirculating towers and closed-loop chilled water circuits.
Process water systems in pulp & paper manufacturing, particularly in white water and coating lines.
Industrial cleaning solutions and metalworking fluid sumps where microbial spoilage compromises fluid life.
Oilfield water injection systems requiring sustained microbiological control to prevent biofilm formation and souring.
Paint and coating formulations as an in-can preservative for waterborne latex and acrylic emulsions.
| Chemical Type | Isothiazolinone-based biocide (mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one) |
| Product Form | Aqueous solution |
| Appearance | Clear, light yellow liquid |
| Active Ingredient Content | 1.5% w/w (total isothiazolinones) |
| pH (as supplied) | 2.0–4.0 |
| Density (20°C) | 1.01–1.03 g/cm³ |
| Solubility | Completely miscible with water |
| Primary Applications | Industrial water treatment, paint & coatings, metalworking fluids, pulp & paper process water |
Q1: What is the primary mode of action of Dow KATHON WT Fungicide?
A: Dow KATHON WT Fungicide functions as a broad-spectrum biocide through irreversible inhibition of key microbial enzymes, disrupting cellular metabolism and leading to rapid loss of viability in bacteria, fungi, and algae.
Q2: In which types of water-based industrial systems is Dow KATHON WT Fungicide typically applied?
A: It is commonly used in recirculating cooling water systems, paper mill process waters, metalworking fluids, latex emulsions, and other water-containing industrial formulations where microbial growth poses risks to product stability, system integrity, or operational efficiency.
Q3: How does Dow KATHON WT Fungicide compare to alternative isothiazolinone biocides in terms of compatibility and residual activity?
A: Dow KATHON WT Fungicide offers excellent compatibility with common water treatment additives—including oxidizing and non-oxidizing biocides, corrosion inhibitors, and dispersants—and provides effective residual control due to its stability under typical operating pH and temperature conditions in industrial water systems.
Q4: What are the recommended handling and safety considerations for this product?
A: As a concentrated biocide, Dow KATHON WT Fungicide should be handled using appropriate personal protective equipment (PPE), including chemical-resistant gloves and eye protection. Users must consult the Safety Data Sheet (SDS) for detailed toxicological information, first-aid measures, and safe storage practices before use.
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