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Broad-spectrum efficacy against bacteria, fungi, and algae in industrial water systems.
Stable performance across a wide pH range (pH 6.0–9.5) and elevated temperatures.
Low toxicity profile with favorable environmental and regulatory acceptance (e.g., compliant with EU BPR requirements).
Compatible with common corrosion inhibitors, scale inhibitors, and other water treatment additives.
Non-oxidizing chemistry, minimizing material compatibility concerns in cooling and process water circuits.
Cooling water systems in power generation and HVAC installations.
Process water circuits in paper manufacturing and pulp mills.
Recirculating water systems in chemical and petrochemical plants.
Make-up water treatment for closed-loop industrial cooling towers.
Preservation of water-based metalworking fluids and emulsions.
| Chemical Type | Isothiazolinone-based biocide blend |
| Product Form | Liquid concentrate |
| Appearance | Clear, pale yellow liquid |
| pH (1% aqueous solution) | 7.0–8.5 |
| Density (20°C) | 1.08–1.12 g/cm³ |
| Solubility | Completely miscible in water |
| Primary Applications | Industrial water treatment, metalworking fluid preservation |
| Key Features | Non-oxidizing, broad-spectrum, low-dose effective |
Q1: What is Solvay Tolcide PS24 Biocide primarily used for?
A: Tolcide PS24 is a broad-spectrum preservative designed for use in water-based industrial formulations, including coatings, adhesives, sealants, construction chemicals, and maintenance fluids—where protection against bacteria, fungi, and yeasts is required during storage and in-service life.
Q2: Is Tolcide PS24 compatible with common formulation ingredients?
A: Yes, Tolcide PS24 demonstrates good compatibility with many surfactants, thickeners, pH adjusters, and typical polymer emulsions found in industrial waterborne systems. Compatibility should always be verified under actual formulation conditions, especially in the presence of strong oxidizers or highly alkaline components.
Q3: How is Tolcide PS24 typically dosed in formulations?
A: Dosage depends on formulation requirements, microbial challenge level, and regulatory context. It is generally used at low concentrations—typically ranging from 0.1% to 2% by weight—added during the cool-down phase or post-emulsification to ensure optimal stability and efficacy.
Q4: Does Tolcide PS24 require pH adjustment for optimal performance?
A: Tolcide PS24 performs effectively across a broad pH range (approximately pH 4–10), making it suitable for both mildly acidic and alkaline systems without mandatory pH adjustment. However, maximum stability and antimicrobial activity are often observed in neutral to slightly alkaline conditions.
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