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Broad-spectrum fungicidal activity against key spoilage microorganisms, including bacteria, yeasts, and molds.
Stable and effective over a wide pH range (pH 4–10), ensuring compatibility with diverse industrial formulations.
Low volatility and non-volatile active ingredient composition, supporting safe handling and long-term storage stability.
Excellent water solubility and rapid dispersion in aqueous systems without requiring organic co-solvents.
Proven performance in challenging high-ionic-strength environments, such as latex emulsions and pigment dispersions.
Water-based architectural coatings and interior/exterior paints.
Industrial maintenance coatings and protective primers.
Adhesives, sealants, and construction mastics.
Latex emulsions used in carpet backing, nonwovens, and paper coatings.
Printing inks and pigment dispersions for packaging applications.
| 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, pale yellow to amber liquid |
| pH (1% aqueous solution) | 2.0 – 5.0 |
| Density (at 25°C) | 1.05 – 1.10 g/cm³ |
| Solubility | Miscible with water; partially miscible with polar organic solvents |
| Primary Applications | Preservation of water-based industrial products |
| Key Features | Non-oxidizing, low-foaming, broad-spectrum antimicrobial efficacy |
Q1: What is the primary mode of action of DOWICIL 75 Fungicide?
A: DOWICIL 75 is a broad-spectrum biocide based on isothiazolinone chemistry, primarily functioning through inhibition of key enzymatic processes in microbial cells, leading to rapid disruption of cellular metabolism and cell death in fungi, bacteria, and algae.
Q2: In which types of industrial formulations is DOWICIL 75 commonly used?
A: It is widely incorporated into water-based industrial products such as metalworking fluids, latex paints and coatings, adhesives, construction chemicals, and polymer emulsions—where sustained protection against microbial spoilage during storage and use is required.
Q3: How does pH affect the stability and performance of DOWICIL 75?
A: DOWICIL 75 exhibits optimal stability and efficacy in mildly acidic to neutral pH ranges (approximately pH 4–8). Performance may decline under strongly alkaline conditions due to increased hydrolysis, and formulation pH should be monitored and controlled accordingly.
Q4: Is DOWICIL 75 compatible with common surfactants and thickeners used in coatings and industrial fluids?
A: Yes, it demonstrates good compatibility with many nonionic and anionic surfactants, as well as associative and cellulosic thickeners. However, compatibility testing under actual formulation conditions—including shear, temperature, and ionic strength—is recommended prior to full-scale implementation.
Q5: What safety and handling precautions should be observed when working with DOWICIL 75?
A: As a skin and eye irritant, appropriate personal protective equipment—including gloves, goggles, and protective clothing—should be worn during handling. Use in well-ventilated areas is advised, and formulations containing DOWICIL 75 should be labeled in accordance with applicable regional hazard communication regulations.
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