CIT/MIT 14% Biocide
High-purity aqueous formulation of 5-chloro-2-methyl-4-isothiazolin-3-one (CMIT) and 2-methyl-4-isothiazolin-3-one (MIT). Delivers broad-spectrum microbial kill against bacteria, fungi, algae, and extracellular bio-slime.
Technical Specification Target
Microbiological Kill Mechanism & Biofilm Penetration
CIT/MIT penetrates bacterial cell walls and reacts with cellular thiol groups (–SH), halting cellular respiration, synthesis of ATP, and cell division within minutes of dosing.
Because of its non-foaming nature and non-oxidizing mechanism, it does not corrode heat exchanger tubes and breaks through dense microbial slime matrices where chlorine cannot penetrate.
Standard Industrial Dosage
| Application | Recommended Dosing |
|---|---|
| Cooling Towers (Shock Slug Dose) | 15.0 – 50.0 ppm |
| Paper & Pulp Slime Prevention | 25.0 – 100.0 g/ton pulp |
| RO Membrane Offline Clean-in-Place | 400 – 1000 ppm |
| Paints, Adhesives & Latex Emulsions | 0.05 – 0.20% |
Packaging, Handling & Safety Controls
- Packaging Options: 25 kg carboys, 250 kg virgin HDPE drums, and 1,250 kg IBC totes.
- Storage Conditions: Keep in a cool, ventilated area away from sunlight and reducing agents (< 40°C).
- Shelf Life: 12 months in factory-sealed containers.
- Handling Safety (GHS Class 8 / 6.1): Corrosive and sensitizing. Use chemical-resistant nitrile gloves, splash apron, goggles, and vapor respirator during transfer.
Frequently Asked Questions: CIT/MIT 14% Biocide
Expert technical answers on dosing, chemistry, handling, and application performance.
Q1. What is CIT/MIT 14% (Isothiazolinone Biocide) and how does it work?
CIT/MIT 14% (CAS 55965-84-9) is a broad-spectrum non-oxidizing biocide containing 5-Chloro-2-methyl-4-isothiazolin-3-one and 2-Methyl-4-isothiazolin-3-one that disrupts cellular respiration and protein synthesis in bacteria, algae, and fungi.
Q2. What is the typical dosage of CIT/MIT 14% in cooling towers?
For cooling towers, intermittent shock slug dosing of 15.0 to 50.0 ppm (15 to 50 g/m³) once or twice weekly is recommended to eradicate microbial biofilms.
Q3. What is the active ratio of CMIT to MIT in ZEELCHEM™ 501?
ZEELCHEM™ 501 maintains the optimal active ratio of approximately 3:1 (CMIT ~10.5–11.0% and MIT ~3.5–4.0%), totaling 14.0–14.5% active matter.