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Broad-spectrum fungicidal activity against key spoilage microorganisms including bacteria, yeasts, and molds.
Stable across a wide pH range (pH 4–10), ensuring compatibility with diverse industrial formulations.
Low volatility and minimal odor, supporting safe handling in enclosed manufacturing environments.
Effective at low use concentrations, delivering cost-efficient preservation without compromising product integrity.
Non-oxidizing chemistry, avoiding degradation of sensitive active ingredients or polymers in end-use systems.
Preservation of water-based paints and coatings.
Microbial control in adhesives and sealants.
Protection of construction chemicals including cementitious mortars and grouts.
Stabilization of architectural and industrial cleaning formulations.
Preservation of nonwoven fabric slurries and paper coating applications.
| Chemical Type | Isothiazolinone-based biocide (mixture of 1,2-benzisothiazolin-3-one and 5-chloro-2-methyl-4-isothiazolin-3-one) |
| Product Form | Aqueous solution |
| Appearance | Clear to slightly hazy, pale yellow liquid |
| pH (1% aqueous solution) | 2.5 – 4.5 |
| Density (at 20°C) | 1.08 – 1.12 g/cm³ |
| Solubility | Completely miscible with water and common polar organic solvents |
| Primary Applications | Industrial preservation for water-based formulations |
| Key Features | Fast-acting, non-leaching, broad-spectrum antimicrobial efficacy |
Q1: What types of industrial systems is DOWICIL QK-20 Fungicide typically used in?
A: DOWICIL QK-20 is primarily formulated for use in water-based industrial process fluids, including metalworking fluids, latex emulsions, adhesives, and architectural coatings—where broad-spectrum fungicidal protection against common spoilage microorganisms is required.
Q2: How does DOWICIL QK-20 differ from other isothiazolinone-based biocides?
A: DOWICIL QK-20 is a proprietary blend optimized for enhanced stability in alkaline and high-salt environments, offering improved compatibility with anionic surfactants and certain thickeners compared to standard isothiazolinone actives—making it especially suitable for challenging formulation matrices.
Q3: What is the recommended dosage range for effective fungal control?
A: Effective dosage varies depending on system composition, microbial challenge, and regulatory requirements, but typical use levels generally range from 0.1% to 2% by weight of active ingredient in the final product—always validated through challenge testing under representative conditions.
Q4: Is DOWICIL QK-20 compatible with common preservative synergists?
A: Yes, DOWICIL QK-20 has demonstrated good compatibility with selected synergists such as benzisothiazolinone (BIT) and certain organic acids, enabling broader antimicrobial spectra and potential dosage reduction—though compatibility must be confirmed experimentally for each specific formulation.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
