Biocide CMIT/MIT 14% – 20L

Maintaining effective microbial control is paramount in various industries, and our Biocide CMIT/MIT 14% in a 20L Drum offers a superior solution. Engineered to combat microbial growth and protect your processes, this biocide is your partner in maintaining product integrity and safety. Choose Viva Blu for peace of mind in microbial control.

Technical Reference

Technical Specifications

Applications & Use Cases

• Industrial cooling water treatment: Biocidal control of bacteria, algae, and fungi in open recirculating and once-through cooling tower systems
• Paper and pulp manufacturing: Slime control in white water systems, pulp storage, and coating lines to prevent biofilm formation and product degradation
• Metalworking and cutting fluids: Preservation of water-miscible metalworking fluids against bacterial and fungal spoilage, extending fluid service life
• Paints, coatings, and adhesives (in-can preservation): Protection of water-based paints, emulsions, and adhesives during manufacture, storage, and distribution
• Oilfield water injection systems: Downhole and topside biocidal treatment to control sulphate-reducing bacteria (SRB) and general heterotrophic bacteria in produced water and injection water systems
• Cosmetics and personal care product preservation: Preservation of rinse-off cosmetic formulations — note: restricted to rinse-off products only in Australia under NICNAS/AICIS assessment; not permitted in leave-on cosmetics
• Industrial process water: Microbiological control in reverse osmosis feed water, membrane biofouling prevention, and process water recirculation loops
• Decorative water features and ornamental ponds: Non-potable water microbial control (not for drinking water systems)
• Construction products: Preservation of water-based construction chemicals including renders, grouts, and sealants during manufacture and storage
• Textile and leather processing: Anti-microbial preservation in dyebaths, finishing liquors, and leather tanning liquors
• Agricultural chemical formulations: Preservation of water-based pesticide formulations where APVMA registration applies

Dosing Rates & Guidelines

All dosing rates are expressed as volume of CMIT/MIT 14% product per volume of treated water or system volume unless otherwise stated. Actual effective dosing is highly dependent on organic loading, pH, temperature, microbial challenge, and contact time. Site-specific jar testing and microbiological monitoring are strongly recommended. The rates below represent industry-standard indicative ranges for Australian practice.

Dilution Instructions

CMIT/MIT 14% is a concentrated, corrosive biocide. Dilution must be carried out with care and appropriate PPE worn at all times. Never add water to concentrated product — always add product to water.

1. Review the Safety Data Sheet (SDS) before commencing any dilution operation. Confirm the intended use concentration and calculate the required volume of concentrate.
2. Don full PPE before handling: chemical-resistant gloves (nitrile minimum 0.38 mm thickness or neoprene), chemical splash goggles (AS/NZS 1337), face shield, and chemical-resistant apron. Respiratory protection (minimum P2 half-face respirator) required in enclosed or poorly ventilated spaces.
3. Prepare dilution vessel: Use HDPE, polypropylene, or stainless steel Grade 316 containers. Do not use aluminium, galvanised steel, mild steel, or copper vessels — CMIT/MIT is corrosive to these metals. Ensure the vessel is clean, dry, and free of incompatible residues.
4. Add the required volume of clean, cool water first (ambient temperature, preferably <25°C) into the dilution vessel.
5. Slowly add the measured volume of CMIT/MIT 14% concentrate to the water with gentle agitation. Do not add water to concentrate. Use a calibrated dosing pump, graduated cylinder, or dedicated measuring container. Avoid splashing.
6. Mix gently until homogeneous. Vigorous agitation is not required and may generate aerosols. Allow foam to subside before transferring.
7. Label the diluted solution immediately with chemical identity, concentration, date of preparation, and hazard information in accordance with the GHS/Model WHS Regulations (Safe Work Australia).
8. Use diluted solutions promptly. Diluted CMIT/MIT has reduced stability compared to the concentrate; prepare only what is required for immediate use where possible. Do not store diluted solutions in direct sunlight or at temperatures above 40°C.
9. Dispose of rinsate and empty containers in accordance with your site’s waste management plan and local council/EPA requirements. Rinse empty drums three times before disposal.

Typical working dilution example (cooling tower, 100 mg/L active dose into a 50,000 L system):
Required active = 50,000 L × 100 mg/L = 5,000,000 mg = 5,000 g active
Product required = 5,000 g ÷ 140 g/L = approximately 35.7 L of 14% product
Always verify calculations before dosing. Pre-dilute 1:10 with water before slug dosing into low-flow sections of a system.

Chemical Compatibility

Compatible With

• Water (fully miscible; primary diluent)
• Most non-ionic and anionic surfactants at typical use concentrations
• Corrosion inhibitors (phosphonate and azole-based) commonly used in cooling water treatment — confirm compatibility by jar testing at specific concentrations
• Scale inhibitors (polyacrylate, phosphonate types) at standard cooling water treatment doses
• HDPE, polypropylene, PVDF, and stainless steel 316 (containers, pipework, and dosing equipment)
• Most dispersants used in industrial water treatment

Incompatible With — Do Not Mix

• Strong oxidising agents (chlorine, bromine, hydrogen peroxide, sodium hypochlorite, peracetic acid): Rapid degradation of the active isothiazolinone ring structure; loss of biocidal efficacy and potential generation of hazardous by-products. Do not dose simultaneously; allow a minimum contact time gap of 2–4 hours in cooling systems when alternating biocide types.
• Strong reducing agents (sodium metabisulphite, sodium sulphite, thiosulphates): Rapid chemical reduction and deactivation of CMIT/MIT; complete loss of biocidal activity. These agents are used intentionally to quench CMIT/MIT in cosmetic challenge testing environments but must never be co-dosed in treatment systems.
• Strong alkaline conditions (pH >9.5): Alkaline hydrolysis of the isothiazolinone structure significantly accelerates degradation and reduces efficacy. Biocidal performance drops substantially above pH 9.0 and is effectively lost above pH 10.
• Amines and nitrogen-containing compounds at high concentrations: Potential nucleophilic ring-opening reactions may reduce biocidal efficacy; jar-test compatibility before blending in formulation work.
• Cationic biocides (quaternary ammonium compounds, DDAC, BAC): Potential for charge interaction and reduced efficacy of both actives; separate dosing points recommended if used in the same system.
• Aluminium, galvanised steel, mild steel, copper, and brass: CMIT/MIT solutions (particularly at acidic pH) are corrosive to these metals; use only HDPE, polypropylene, or stainless steel 316 for all contact surfaces.
• Polyamide (PA) and cellulose acetate RO membranes: CMIT/MIT can degrade polyamide thin-film composite membranes