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Broad-spectrum efficacy against bacteria, fungi, and algae in industrial water systems.
Stable performance across a wide pH range (pH 4–9) and tolerant to common water treatment additives.
Low-foaming formulation suitable for high-shear and recirculating cooling water applications.
Compatible with oxidizing biocides for synergistic control in hybrid treatment programs.
Non-volatile and non-corrosive to mild steel, copper, and stainless steel alloys under recommended dosing.
Cooling water systems in power generation and HVAC facilities.
Process water circuits in pulp and paper manufacturing.
Recirculating water in metalworking fluid sumps and central coolant systems.
Make-up water treatment for closed-loop industrial heat exchange systems.
Preservation of aqueous-based coatings, adhesives, and emulsions during storage.
| Chemical Type | Isothiazolinone-based blend (active: 50% 2-methyl-4-isothiazolin-3-one and 5-chloro-2-methyl-4-isothiazolin-3-one) |
| Product Form | Liquid concentrate |
| Appearance | Clear, amber-colored liquid |
| Primary Applications | Industrial water treatment, metalworking fluids, coatings, and adhesives preservation |
| pH (1% aqueous solution) | 3.5–5.0 |
| Density (25°C) | 1.12–1.16 g/cm³ |
| Solubility | Miscible with water in all proportions |
| Storage Stability | ≥24 months at 5–30°C in original sealed container |
Q1: What is the primary mode of action of Dow ZOLDINE IG50 Biocide?
A: Dow ZOLDINE IG50 Biocide functions primarily as a broad-spectrum antimicrobial agent through membrane disruption and interference with essential cellular processes in bacteria, yeasts, and molds. Its active ingredient is designed for effective preservation in water-based industrial formulations.
Q2: In which types of industrial systems is Dow ZOLDINE IG50 Biocide commonly used?
A: It is widely employed in water-based industrial fluids such as metalworking fluids, latex paints and coatings, adhesives, construction chemicals, and cleaning concentrates—particularly where long-term microbial stability and low-odor performance are required.
Q3: Is Dow ZOLDINE IG50 Biocide compatible with common formulation ingredients?
A: Yes, it demonstrates good compatibility with anionic, nonionic, and amphoteric surfactants, thickeners, defoamers, and common pH buffers across typical use pH ranges (approximately 5–10). Compatibility testing under actual formulation conditions is recommended prior to full-scale implementation.
Q4: How should Dow ZOLDINE IG50 Biocide be dosed in formulations?
A: Dosage depends on formulation requirements, challenge level, and regulatory considerations—but it is typically used at low concentrations, generally ranging from 0.1% to 2% by weight, with optimal performance often achieved within the lower end of this range when combined with good manufacturing hygiene practices.
Q5: Does Dow ZOLDINE IG50 Biocide require special handling or storage conditions?
A: It should be stored in its original sealed container at temperatures between 5°C and 30°C, protected from direct sunlight and freezing. As with all industrial biocides, appropriate personal protective equipment (PPE) such as gloves and eye protection is recommended during handling to minimize skin and eye contact.
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