Description
High-Quality Isothiazolinone Biocides
Isothiazolinone biocides represent a class of heterocyclic organic compounds featuring a five-membered ring structure containing sulfur and nitrogen atoms, providing exceptional broad-spectrum antimicrobial activity against bacteria, fungi, yeasts, and algae. The primary commercial isothiazolinones include Methylisothiazolinone (MIT), Chloromethylisothiazolinone (CMIT), Octylisothiazolinone (OIT), Benzisothiazolinone (BIT), and 4,5-Dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT), each offering unique performance characteristics and application suitability. These compounds function through multiple mechanisms including disruption of cellular metabolism, inhibition of dehydrogenase enzymes, and interference with microbial protein synthesis, providing rapid knock-down activity followed by sustained antimicrobial protection. With excellent chemical stability, broad pH tolerance, and outstanding efficacy at low concentrations, isothiazolinone biocides demonstrate superior performance in challenging environments including high temperature systems, alkaline conditions, and biofilm-prone applications, making them essential for industrial water treatment, metalworking fluid preservation, paper mill operations, paint and coating formulations, personal care product preservation, and specialized chemical applications requiring reliable antimicrobial control and proven long-term effectiveness.
At Chemicals & Process Equipment Limited, we supply high-performance Isothiazolinone Biocides manufactured under stringent quality control standards and international antimicrobial specifications. Our comprehensive product range includes various active ingredient combinations, concentrations, and specialized formulations meeting diverse requirements for industrial preservation, water treatment, manufacturing applications, and consumer product formulations across global water treatment, metalworking, paper, coatings, and specialty chemical markets.
✅ Advanced Antimicrobial Technology – Optimized Chemistry & Multi-Application Performance
✅ Consistent Quality Standards – Multiple Active Classifications with Comprehensive Documentation
✅ Essential Preservative Agents – Superior Industrial, Water Treatment & Manufacturing Performance
✅ Multi-Industry Applications – Water Systems, Metalworking, Paper, Coatings, Personal Care & Specialty Systems
✅ Technical Support Package – Complete Application Guidance & Performance Optimization
The global isothiazolinone biocides market size was valued at USD 9.1 billion in 2023 and is expected to reach USD 13.2 billion by 2030 with a CAGR of 4.3% during the forecast period 2024-2030, driven by increasing demand for antimicrobial and preservative solutions across industrial manufacturing, water treatment infrastructure, and consumer product applications.
Technical Specifications & Isothiazolinone Properties
| Property | MIT Grade | CMIT/MIT Grade | OIT Grade | BIT Grade | DCOIT Grade | Marine Grade |
|---|---|---|---|---|---|---|
| Active Content (%) | ≥14.0 | ≥14.0 | ≥45.0 | ≥20.0 | ≥30.0 | ≥15.0 |
| MIT Content (%) | ≥14.0 | ≥4.5 | – | – | – | Variable |
| CMIT Content (%) | – | ≥9.5 | – | – | – | Variable |
| OIT Content (%) | – | – | ≥45.0 | – | – | – |
| BIT Content (%) | – | – | – | ≥20.0 | – | – |
| DCOIT Content (%) | – | – | – | – | ≥30.0 | ≥10.0 |
| Water Content (%) | Balance | Balance | <1.0 | <5.0 | <2.0 | Balance |
| pH (as supplied) | 2.0-4.0 | 2.0-4.0 | 8.0-10.0 | 8.5-10.5 | 6.0-8.0 | 2.5-4.5 |
| Density (g/cm³, 20°C) | 1.02-1.08 | 1.02-1.08 | 0.95-1.05 | 1.05-1.15 | 1.10-1.20 | 1.00-1.10 |
| Viscosity (cP, 20°C) | 5-15 | 5-15 | 50-150 | 100-300 | 200-500 | 10-30 |
| Flash Point (°C) | >100 | >100 | >150 | >200 | >180 | >100 |
| Freezing Point (°C) | <-5 | <-5 | 5-15 | >20 | 10-25 | <-2 |
| Vapor Pressure (Pa, 25°C) | <1.0 | <1.0 | <0.1 | <0.01 | <0.001 | <1.0 |
| Solubility (water, g/L) | Miscible | Miscible | 0.5-1.5 | 1-5 | 0.1-0.5 | Variable |
| Log Kow | -0.5 | Variable | 2.5-3.5 | 1.5-2.5 | 4.5-5.5 | Variable |
| Stability (pH 7, 50°C, weeks) | >12 | >12 | >24 | >52 | >52 | >8 |
| Temperature Stability (°C) | 5-60 | 5-60 | 10-80 | 20-90 | 20-85 | 5-70 |
| Minimum Inhibitory Concentration (ppm) | 2-10 | 1-8 | 5-20 | 10-50 | 1-5 | 3-15 |
| Broad Spectrum Activity | Excellent | Excellent | Excellent | Good | Excellent | Excellent |
| Bacteria (log kill/24h) | >6.0 | >6.0 | >5.0 | >4.0 | >6.0 | >5.5 |
| Fungi (log kill/48h) | >4.0 | >4.0 | >5.0 | >5.5 | >4.5 | >4.0 |
| Yeasts (log kill/24h) | >5.0 | >5.0 | >4.5 | >4.0 | >5.0 | >4.5 |
| Algae (growth inhibition, %) | >95 | >95 | >90 | >85 | >95 | >92 |
| Biofilm Penetration | Excellent | Excellent | Good | Good | Excellent | Good |
| Resistance Development | Low | Low | Low | Moderate | Very Low | Low |
| Contact Time (minutes) | 5-15 | 5-15 | 15-30 | 30-60 | 10-30 | 10-20 |
| Residual Activity (days) | 7-14 | 7-14 | 14-30 | 30-60 | 21-45 | 5-12 |
| pH Range (effective) | 6.0-9.0 | 6.0-9.0 | 7.0-10.0 | 8.0-11.0 | 6.5-9.5 | 6.5-8.5 |
| Hard Water Tolerance | Good | Good | Excellent | Excellent | Excellent | Good |
| Metal Ion Compatibility | Good | Good | Excellent | Good | Excellent | Fair |
| Chlorine Compatibility | Fair | Fair | Poor | Good | Fair | Fair |
| Formaldehyde Free | Yes | Yes | Yes | Yes | Yes | Yes |
| Phenol Free | Yes | Yes | Yes | Yes | Yes | Yes |
| Heavy Metal Free | Yes | Yes | Yes | Yes | Yes | Yes |
| Halogen Free | No | No | Yes | Yes | No | Variable |
| Corrosion Rate (mils/year) | <1.0 | <1.0 | <2.0 | <1.5 | <2.5 | <3.0 |
| Material Compatibility | Good | Good | Excellent | Good | Good | Good |
| Foam Impact | Minimal | Minimal | None | Minimal | None | Minimal |
| Color Impact | None | None | Slight | None | Slight | None |
| Odor | Slight | Slight | Mild | Mild | Mild | Slight |
| Environmental Persistence | Moderate | Moderate | Low | Low | Very Low | Moderate |
| Biodegradability (%) | >80 | >80 | >85 | >90 | >75 | >78 |
| Aquatic Toxicity (EC₅₀, mg/L) | 0.1-1.0 | 0.1-1.0 | 0.05-0.5 | 1.0-10 | 0.01-0.1 | 0.2-2.0 |
| Bioaccumulation Factor | <100 | <100 | 100-500 | <50 | 1000-5000 | <200 |
| Skin Sensitization | High | High | Moderate | Low | Low | High |
| Eye Irritation | Severe | Severe | Moderate | Mild | Mild | Severe |
| Respiratory Sensitization | Potential | Potential | Low | Very Low | Very Low | Potential |
| Acute Oral Toxicity (LD₅₀, mg/kg) | 50-100 | 50-100 | 100-500 | 500-1000 | 1000+ | 100-200 |
| Dermal Toxicity (LD₅₀, mg/kg) | 100-200 | 100-200 | 200-1000 | 1000+ | 2000+ | 200-500 |
| Storage Temperature (°C) | 5-35 | 5-35 | 10-40 | 15-40 | 15-35 | 5-30 |
| Storage Stability (years) | 2-3 | 2-3 | 3-5 | 5+ | 5+ | 2 |
| Light Sensitivity | Moderate | Moderate | Low | Very Low | Low | Moderate |
| Container Material | HDPE/SS | HDPE/SS | HDPE/SS | Various | Various | HDPE |
| Shipping Classification | UN3082 | UN3082 | UN3077 | UN3077 | UN3077 | UN3082 |
| Regulatory Status | Restricted | Restricted | Approved | Approved | Approved | Restricted |
| BPR Approval | Active | Active | Active | Active | Active | Active |
| EPA Registration | Required | Required | Active | Active | Active | Required |
| Food Contact Status | No | No | Limited | Limited | No | No |
| Cosmetic Use | Restricted | Restricted | No | Limited | No | No |
| CAS Number | 2682-20-4 | Mixed | 26530-20-1 | 2634-33-5 | 64359-81-5 | Mixed |
| EINECS Number | 220-239-6 | Multiple | 247-761-7 | 220-120-9 | 264-843-8 | Multiple |
| Molecular Formula | C₄H₅NOS | Mixed | C₁₁H₁₉NOS | C₇H₅NOS | C₁₁H₁₇Cl₂NOS | Mixed |
| Molecular Weight (g/mol) | 115.15 | Mixed | 213.34 | 151.19 | 298.24 | Mixed |
| Packaging | 25kg drums | 200kg drums | 20kg containers | 25kg containers | 20kg drums | 25kg drums |
Available Active Ingredient Types:
- MIT (Methylisothiazolinone) for general industrial preservation
- CMIT/MIT Blend for enhanced broad-spectrum activity
- OIT (Octylisothiazolinone) for paint and coating applications
- BIT (Benzisothiazolinone) for industrial water treatment
- DCOIT (Dichlorooctylisothiazolinone) for marine and specialized applications
- Custom blends for specific application requirements
- Stabilized formulations for extended storage
- Low-sensitization alternatives for consumer applications
- Marine-grade formulations for antifouling systems
- High-temperature stable variants for industrial processes
- pH-optimized formulations for specific systems
- Synergistic combinations with other biocides
Specialized Formulation Options:
- Aqueous solutions for easy handling and dosing
- Concentrated formulations for cost-effective shipping
- Emulsion systems for improved stability
- Microencapsulated forms for controlled release
- Powder formulations for dry blending applications
- Masterbatch concentrates for manufacturing
- Ready-to-use solutions for direct application
- Custom concentration levels for specific needs
Industrial Water Treatment Applications
Cooling Water Systems Industrial facilities utilize isothiazolinone biocides for cooling tower treatment, heat exchanger protection, and recirculating water systems requiring cooling water specifications. Manufacturing companies employ isothiazolinones for microbial control, biofilm prevention, and cooling applications requiring operational efficiency and reduced maintenance costs with enhanced heat transfer performance.
Process Water Treatment Manufacturing operations use isothiazolinone biocides for process water disinfection, system protection, and quality control requiring process water specifications. Industrial companies employ isothiazolinones for contamination prevention, product quality, and process applications requiring consistent water quality and production reliability.
Boiler Water Treatment Power generation facilities utilize isothiazolinone biocides for boiler feedwater treatment, steam system protection, and condensate polishing requiring boiler specifications. Utility companies employ isothiazolinones for system efficiency, corrosion prevention, and boiler applications requiring optimal steam generation and equipment longevity.
Metalworking Fluid Applications
Water-Based Cutting Fluids Metalworking manufacturers utilize isothiazolinone biocides for cutting fluid preservation, microbial control, and fluid life extension requiring metalworking specifications. Machining operations employ isothiazolinones for odor control, operator health protection, and metalworking applications requiring superior cutting performance and extended fluid service life.
Grinding Coolants Precision manufacturing facilities use isothiazolinone biocides for grinding fluid preservation, surface quality maintenance, and contamination control requiring grinding specifications. Tool and die companies employ isothiazolinones for workpiece protection, dimensional accuracy, and grinding applications requiring optimal surface finish and process reliability.
Metal Treatment Baths Metal finishing operations utilize isothiazolinone biocides for cleaning solution preservation, pre-treatment bath protection, and process consistency requiring metal treatment specifications. Surface treatment companies employ isothiazolinones for bath life extension, quality control, and metal applications requiring consistent processing and coating adhesion.
Paper Manufacturing Applications
Process Water Treatment Paper manufacturers utilize isothiazolinone biocides for white water system treatment, process loop protection, and quality control requiring paper process specifications. Pulp and paper companies employ isothiazolinones for microbial control, production efficiency, and paper applications requiring consistent product quality and reduced downtime.
Pulp Bleaching Systems Paper production facilities use isothiazolinone biocides for bleach plant protection, brightness maintenance, and contamination control requiring pulp specifications. Paper manufacturers employ isothiazolinones for process optimization, quality enhancement, and pulp applications requiring superior brightness and strength properties.
Coating Kitchen Applications Paper coating operations utilize isothiazolinone biocides for coating color preservation, application system protection, and quality maintenance requiring coating specifications. Specialty paper manufacturers employ isothiazolinones for product consistency, shelf life extension, and coating applications requiring optimal print quality and appearance.
Paint & Coating Applications
Architectural Coatings Paint manufacturers utilize isothiazolinone biocides for in-can preservation, dry film protection, and shelf life extension requiring architectural specifications. Coating companies employ isothiazolinones for microbial stability, application properties, and paint applications requiring durability and appearance retention with enhanced performance characteristics.
Industrial Coatings Specialty coating manufacturers use isothiazolinone biocides for high-performance systems, corrosion protection, and environmental resistance requiring industrial specifications. Protective coating companies employ isothiazolinones for long-term protection, chemical resistance, and industrial applications requiring extreme service conditions and reliability.
Marine Coatings Antifouling manufacturers utilize isothiazolinone biocides for marine paint systems, hull protection, and fouling prevention requiring marine specifications. Maritime coating companies employ isothiazolinones for vessel performance, fuel efficiency, and marine applications requiring environmental compliance and operational effectiveness.
Personal Care Applications
Cosmetic Preservation Personal care manufacturers utilize isothiazolinone biocides for product preservation, shelf life extension, and safety assurance requiring cosmetic specifications. Beauty companies employ isothiazolinones for microbial control, product stability, and cosmetic applications requiring consumer safety and regulatory compliance with controlled usage levels.
Household Products Consumer product manufacturers use isothiazolinone biocides for cleaning product preservation, antimicrobial activity, and product performance requiring household specifications. Chemical companies employ isothiazolinones for product effectiveness, shelf stability, and household applications requiring consumer protection and efficacy standards.
Industrial Cleaners Cleaning product manufacturers utilize isothiazolinone biocides for institutional cleaners, sanitizing products, and disinfectant formulations requiring industrial cleaning specifications. Sanitation companies employ isothiazolinones for antimicrobial effectiveness, product stability, and cleaning applications requiring pathogen control and surface protection.
Specialty Chemical Applications
Adhesive Systems Adhesive manufacturers utilize isothiazolinone biocides for product preservation, storage stability, and contamination prevention requiring adhesive specifications. Bonding system companies employ isothiazolinones for shelf life extension, performance maintenance, and adhesive applications requiring consistent bonding strength and durability.
Polymer Emulsions Chemical manufacturers use isothiazolinone biocides for latex preservation, emulsion stability, and contamination control requiring polymer specifications. Resin companies employ isothiazolinones for product quality, storage life, and polymer applications requiring optimal properties and processing characteristics.
Oil Field Chemicals Petroleum service companies utilize isothiazolinone biocides for drilling fluid preservation, produced water treatment, and system protection requiring oil field specifications. Energy companies employ isothiazolinones for operational efficiency, equipment protection, and oil field applications requiring environmental compliance and performance reliability.
Quality Control & Testing Procedures
Comprehensive Quality Assurance Every production batch undergoes extensive testing to ensure compliance with international biocide standards, antimicrobial specifications, preservation requirements, and regulatory guidelines. Our quality control laboratory employs advanced analytical techniques including HPLC analysis, microbial efficacy testing, and comprehensive stability evaluation.
Quality assurance procedures include:
- Active ingredient content determination using high-performance liquid chromatography (HPLC)
- Purity analysis using gas chromatography-mass spectrometry (GC-MS)
- Water content measurement using Karl Fischer titration
- pH determination using calibrated electrode systems
- Density measurement using digital density meters
- Viscosity testing using rotational viscometers
- Flash point determination using standardized methods
- Freezing point measurement using controlled cooling systems
- Vapor pressure analysis using manometric methods
- Solubility testing in various solvents and pH conditions
- Partition coefficient determination using shake-flask methods
- Thermal stability evaluation using differential scanning calorimetry
- Chemical stability assessment under various conditions
- Microbial efficacy testing against target organisms
- Minimum inhibitory concentration (MIC) determination
- Time-kill studies using standardized protocols
- Broad-spectrum activity evaluation against bacteria, fungi, and algae
- Biofilm penetration assessment using specialized test methods
- Resistance development studies using serial passage methods
- Contact time effectiveness evaluation
- Residual activity monitoring using analytical methods
- pH compatibility testing across application ranges
- Temperature stability assessment under use conditions
- Hard water tolerance evaluation using synthetic solutions
- Metal ion compatibility studies
- Chlorine compatibility assessment where applicable
- Corrosion rate testing using standard metal coupons
- Material compatibility evaluation with common substrates
- Environmental fate studies including biodegradation
- Aquatic toxicity screening using standard test species
- Bioaccumulation potential assessment
- Skin sensitization potential evaluation using validated methods
- Eye irritation assessment using in-vitro methods
- Acute toxicity studies using standardized protocols
- Storage stability monitoring under various conditions
- Light sensitivity evaluation using UV exposure
- Container compatibility testing for recommended materials
- Shipping stability assessment under transport conditions
- Regulatory compliance verification for target markets
- Performance benchmarking against competitive products
- Application testing in relevant systems
- Quality consistency monitoring using statistical process control
Storage & Handling Procedures Implement proper storage conditions including temperature control according to product specifications, protection from direct sunlight and extreme temperatures, appropriate ventilation systems, and compatible container materials for maintaining isothiazolinone quality and preventing degradation throughout storage and handling operations.
For comprehensive information about isothiazolinone biocide mechanisms, antimicrobial effectiveness, and safety profiles, you can reference this detailed research on isothiazolinone biocides chemistry, biological, and toxicity profiles from the National Center for Biotechnology Information which provides extensive coverage of molecular mechanisms, biological activity, and comprehensive safety evaluations.
Market Applications & Industry Trends
Industrial Water Treatment Growth Expanding manufacturing infrastructure, increasing water recycling requirements, and growing microbial control needs drive significant growth in isothiazolinone consumption for cooling systems, process water treatment, and industrial applications requiring effective antimicrobial technology and operational efficiency.
Metalworking Industry Development Growing manufacturing sectors, increasing precision machining demand, and expanding automation drive adoption of isothiazolinone biocides for cutting fluid preservation, contamination control, and metalworking applications requiring extended fluid life and operator safety with enhanced performance characteristics.
Paper Manufacturing Expansion Developing paper markets, increasing quality requirements, and growing sustainable production practices support growth in isothiazolinone applications for process water treatment, product preservation, and paper manufacturing requiring microbial control and production optimization.
Paint & Coating Market Growth Expanding construction activities, increasing industrial coating demand, and growing high-performance requirements support growth in isothiazolinone applications for paint preservation, coating protection, and specialty applications requiring durability and appearance retention with regulatory compliance.
Environmental & Regulatory Compliance
Industrial Biocide Safety Standards & Certifications Isothiazolinone biocides comply with industrial biocide regulations, occupational health guidelines, and international chemical safety standards ensuring appropriate use in industrial applications with established exposure limits and comprehensive safety data documentation.
Personal Care Product Compliance Standards Adherence to cosmetic regulations, consumer product safety standards, and international personal care guidelines supports safe use in consumer applications with established concentration limits and comprehensive safety assessments for skin contact applications.
Environmental Protection Standards Environmental compliance includes discharge regulations, aquatic life protection guidelines, and biodegradation requirements ensuring responsible use through proper application methods and disposal practices supporting ecological safety and environmental sustainability.
Worker Safety Standards Compliance with occupational health regulations, personal protective equipment requirements, and workplace safety guidelines ensures appropriate handling in industrial settings with established exposure monitoring and comprehensive safety training programs.
Performance Advantages & Technical Benefits
✔ Superior Broad-Spectrum Activity – Effective against bacteria, fungi, yeasts, and algae across diverse applications
✔ Rapid Antimicrobial Action – Quick knock-down effect with sustained residual protection
✔ Low Use Concentrations – Effective at minimal dosage levels for cost-efficient treatment
✔ pH Versatile Performance – Effective across wide pH ranges from acidic to alkaline conditions
✔ Temperature Stable – Maintains activity under elevated temperature applications
✔ Multiple Active Options – Various isothiazolinone types for application-specific optimization
✔ Excellent Chemical Stability – Resistant to degradation under normal storage conditions
✔ Biofilm Penetration – Effective against established biofilms and microbial communities
✔ Low Resistance Development – Multiple mode of action reduces resistance potential
✔ Formulation Flexibility – Compatible with various system chemistries and additives
✔ Regulatory Approved – Compliant with international biocide and safety regulations
✔ Environmental Compatibility – Biodegradable with manageable environmental profile
✔ Quality Consistent – Reliable performance across production batches and applications
✔ Technical Documentation – Complete application guidance and safety information
✔ Global Availability – Established supply chain and distribution network
✔ Innovation Support – Advanced chemistry for next-generation antimicrobial applications
Our Isothiazolinone Biocide products represent industry-leading standards in antimicrobial technology and multi-application performance, specifically selected for demanding industrial water treatment operations, metalworking fluid preservation, paper manufacturing processes, paint and coating formulations, and specialized chemical applications requiring exceptional broad-spectrum effectiveness, rapid microbial control, and regulatory compliance. We provide comprehensive technical support, application guidance, and system optimization consultation to ensure optimal performance across your specialized water treatment, metalworking, manufacturing, or preservation applications.
For detailed specifications, technical data sheets, or application-specific recommendations, contact our specialized biocide division. We offer complete support including efficacy testing, regulatory assistance, and technical consultation to maximize effectiveness in your water treatment, metalworking, manufacturing, or specialty chemical applications.
For more information about our products, feel free to Contact Us today.
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