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Broad-spectrum fungicidal activity against key spoilage microorganisms including Aspergillus, Penicillium, and Cladosporium species.
Stable and effective in acidic to neutral pH ranges (pH 3.0–7.5), supporting compatibility with a wide range of industrial formulations.
Low volatility and non-volatile residue profile, minimizing odor impact and enhancing workplace safety during handling.
Highly soluble in water and polar organic solvents, enabling uniform dispersion in aqueous-based systems without precipitation.
Designed for long-term preservation—provides robust protection against fungal growth throughout product shelf life under ambient storage conditions.
Water-based architectural coatings and paints.
Industrial metalworking fluids and coolant emulsions.
Adhesives, sealants, and caulking compounds.
Construction additives including cementitious and gypsum-based slurries.
Nonwoven fabric treatments and wet-strength resins for hygiene products.
| Chemical Type | Isothiazolinone-based biocide (mixture of 1,2-benzisothiazolin-3-one and 5-chloro-2-methyl-4-isothiazolin-3-one) |
| Product Form | Liquid concentrate |
| Appearance | Clear, pale yellow to amber liquid |
| pH (1% aqueous solution) | 3.0 – 5.0 |
| Density (20°C) | 1.12 – 1.16 g/cm³ |
| Solubility | Miscible with water and common polar solvents (e.g., glycols, alcohols) |
| Primary Applications | Fungal preservation in water-based industrial formulations |
| Key Features | Non-oxidizing, non-leaching, low-foaming, and compatible with anionic, nonionic, and amphoteric surfactants |
Q1: What is the primary mode of action of Dow BIOBAN 551S Fungicide?
A: Dow BIOBAN 551S functions as a broad-spectrum fungistatic agent, primarily inhibiting fungal growth through interference with essential cellular metabolic processes. Its activity is effective against common spoilage and contamination fungi encountered in industrial water systems and polymer formulations.
Q2: In which types of formulations is Dow BIOBAN 551S typically incorporated?
A: It is commonly used in water-based industrial coatings, adhesives, sealants, latex emulsions, and construction chemicals where long-term protection against microbial degradation is required. Its compatibility with many anionic and nonionic systems supports its use in diverse aqueous formulations.
Q3: How should Dow BIOBAN 551S be handled during formulation to ensure optimal performance?
A: For best results, add Dow BIOBAN 551S during the cool-down phase of manufacturing, after high-temperature processing steps. Avoid prolonged exposure to strongly alkaline conditions or highly oxidizing environments, as these may reduce efficacy. Good dispersion and uniform distribution throughout the batch are recommended.
Q4: Is Dow BIOBAN 551S suitable for use in products intended for indirect food contact applications?
A: Dow BIOBAN 551S is not specifically approved for direct food contact applications. However, it may be considered for certain indirect food contact scenarios—such as in packaging adhesives or coatings—subject to evaluation by regulatory experts and alignment with applicable regional requirements. End-use compliance remains the responsibility of the formulator.
Q5: What storage conditions are recommended to maintain product stability?
A: Store Dow BIOBAN 551S in its original sealed container in a cool, dry place, away from direct sunlight and sources of heat. Under these conditions, shelf life is typically maintained for up to 24 months from the date of manufacture.
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