Description

5-Chloro-2-Methyl-4-Isothiazolin-3-One-2-Methyl-4-Isothiazolin-3-One Mixture is a highly effective, broad-spectrum biocide blend, commonly known as CMIT/MIT. This synergistic combination provides superior antimicrobial activity against bacteria, fungi, and algae at low concentrations. It is a critical component for preserving the integrity and shelf-life of water-based formulations across numerous industrial and consumer sectors. The product is supplied as a stabilized aqueous solution for safe and convenient handling.

Application

• Industrial Water Treatment: Primary biocide for cooling towers, process water, and paper mill systems to control microbial growth and biofouling.
• Paints & Coatings Preservation: In-can preservative for latex paints, polymer emulsions, adhesives, and sealants to prevent spoilage.
• Personal Care & Cosmetics: Preservative in shampoos, liquid soaps, creams, and lotions to ensure product safety and stability.
• Household & Institutional Products: Used in laundry detergents, fabric softeners, and hard surface cleaners for microbial control.
• Metalworking Fluids: Essential for preserving synthetic and semi-synthetic metalworking fluids against bacterial degradation.
• Oilfield Applications: Controls sulfate-reducing bacteria (SRB) and other microbes in drilling muds, fracturing fluids, and produced water.

Basic Information

Product Name	5-Chloro-2-Methyl-4-Isothiazolin-3-One-2-Methyl-4-Isothiazolin-3-One Mixture
CAS No.	96118-96-6
Molecular Formula	C4H4ClNOS (CMIT) / C4H5NOS (MIT)
Molecular Weight	149.59 g/mol (CMIT) / 115.15 g/mol (MIT)
Synonyms	CMIT/MIT (3:1); Chloromethylisothiazolinone/Methylisothiazolinone; Kathon CG; Isothiazolinone Biocide; 5-Chloro-2-methyl-3(2H)-isothiazolone mixture with 2-methyl-3(2H)-isothiazolone; Euxyl K 100; Acticide; Rocima.
EINECS	Contact for details

Quality Control

Our CMIT/MIT biocide is manufactured under strict quality management systems to ensure batch-to-batch consistency and efficacy. Every lot is tested to confirm the precise ratio of active components (typically 3:1 CMIT to MIT) and meets stringent specifications for purity and stability. Certificates of Analysis (COA) documenting assay, pH, density, and other critical parameters are available upon request. We support compliance with relevant global regulations for biocidal products.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). Do not freeze. Keep away from heat, sparks, and open flame. Containers should be kept tightly sealed when not in use to prevent evaporation or contamination. Store away from strong oxidizing agents and strong reducing agents.

Specification

Item	Specification
Appearance	Clear, pale yellow to amber liquid
Assay (Total Active, HPLC)	≥ 13.9 %
CMIT:MIT Ratio	Approx. 3:1
pH (as supplied)	2.0 - 5.0
Density (20°C)	1.02 - 1.04 g/mL
Solubility	Miscible with water, lower alcohols

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.