Highly effective broad-spectrum biocide against bacteria, fungi, and algae in water-based systems.
Stable across a wide pH range (pH 4–10), maintaining efficacy under varying process conditions.
Low odor profile and favorable toxicological profile for safer handling in industrial environments.
Compatible with common water treatment additives, including corrosion inhibitors and dispersants.
Non-oxidizing mode of action, minimizing material compatibility concerns with metals and elastomers.
Cooling water systems in HVAC and industrial heat exchange applications.
Process water circuits in paper manufacturing and pulp mill operations.
Recirculating water systems in metalworking fluid sumps and central coolant systems.
Preservation of water-based coatings, adhesives, and construction chemicals during storage.
Control of microbial growth in oilfield produced water and secondary recovery injection systems.
| Chemical Type | Isothiazolinone-based blend (primarily 2-methyl-4-isothiazolin-3-one and 5-chloro-2-methyl-4-isothiazolin-3-one) |
| Product Form | Aqueous solution |
| Appearance | Clear, light yellow to amber liquid |
| pH (as supplied) | 2.0 – 4.0 |
| Density (20°C) | 1.08 – 1.12 g/cm³ |
| Active Ingredient Content | 1.5% w/w total isothiazolinones |
| Primary Applications | Non-oxidizing biocide for industrial water systems and water-based formulations |
| Key Features | Broad-spectrum activity, pH stability, low volatility, and formulation compatibility |
Q1: What is the primary mode of action of Dow ROCIMA 342 Biocide?
A: Dow ROCIMA 342 Biocide functions primarily as a broad-spectrum antimicrobial agent effective against bacteria, yeasts, and molds. Its activity stems from disruption of microbial cell membranes and interference with essential cellular processes, leading to rapid biostatic and biocidal effects in aqueous systems.
Q2: In which types of industrial formulations is Dow ROCIMA 342 Biocide commonly used?
A: It is widely employed in water-based industrial products such as metalworking fluids, latex paints and coatings, adhesives, sealants, construction chemicals, and cleaning concentrates—where long-term preservation against microbial spoilage is required during storage and use.
Q3: Is Dow ROCIMA 342 Biocide compatible with common formulation ingredients?
A: Yes, it demonstrates good compatibility with anionic, nonionic, and amphoteric surfactants, thickeners, defoamers, and many common co-biocides. Compatibility should always be verified experimentally in the final formulation due to potential interactions with specific additives or pH-sensitive components.
Q4: How should Dow ROCIMA 342 Biocide be dosed in formulations?
A: Dosage depends on formulation requirements, challenge level, and regulatory considerations. It is typically used at low concentrations, generally ranging from 0.1% to 2% by weight, with optimal levels determined through preservative efficacy testing (PET) under relevant industry guidelines.
Q5: Does Dow ROCIMA 342 Biocide require pH adjustment for optimal performance?
A: It performs effectively across a broad pH range (approximately pH 4–10), though maximum stability and antimicrobial activity are typically observed in mildly acidic to neutral conditions. Significant deviations outside this range may affect shelf life or efficacy and warrant additional evaluation.
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