Description

4,5-Dichloro-2-Methyl-3(2H)-Isothiazolone is a highly effective, broad-spectrum biocide and preservative. It is valued for its potent antimicrobial activity against bacteria, fungi, and algae at low concentrations. This compound is essential for manufacturers in industries such as paints & coatings, metalworking fluids, and personal care, where microbial contamination control is critical for product stability and shelf life.

Application

• Paints, Coatings, and Adhesives: Acts as an in-can preservative to prevent spoilage and maintain viscosity during storage.
• Metalworking Fluids and Coolants: Provides robust microbial control in recirculating systems, preventing odor, corrosion, and fluid degradation.
• Personal Care and Cosmetics: Used as a preservative in shampoos, creams, and lotions to ensure product safety and longevity.
• Industrial Water Treatment: Controls slime-forming bacteria and algae in cooling towers, pulp & paper mills, and other process water systems.
• Household and Institutional Cleaners: Serves as a preservative in liquid formulations to maintain efficacy and prevent contamination.
• Wood and Material Protection: Incorporated into treatments to provide resistance against mold, mildew, and fungal decay.

Basic Information

Product Name	4,5-Dichloro-2-Methyl-3(2H)-Isothiazolone
CAS No.	26542-23-4
Molecular Formula	C4H3Cl2NOS
Molecular Weight	184.04 g/mol
Synonyms	DCMIT; 4,5-Dichloro-2-methyl-4-isothiazolin-3-one; 4,5-Dichloro-2-methyl-3-isothiazolone; 3(2H)-Isothiazolone, 4,5-dichloro-2-methyl-; 2-Methyl-4,5-dichloro-3(2H)-isothiazolone; Kathon 886; Kathon 886 MW; Micro-Chek 11D
EINECS	247-761-7

Quality Control

Our 4,5-Dichloro-2-Methyl-3(2H)-Isothiazolone is manufactured under stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee consistency and compliance with your formulation requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong bases and incompatible materials such as strong oxidizing agents and amines. The container must be kept tightly sealed to prevent moisture ingress and degradation.

Specification

Item	Specification
Appearance	White to off-white powder or crystals
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Melting Point	54 - 58 °C
Loss on Drying	≤ 1.0 %
Related Substances (HPLC)	Total impurities ≤ 5.0%

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