Description

2-Methyl-4-Isothiazolin-3-One Hydrochloride is a potent, water-soluble biocide salt derived from a widely used isothiazolinone active. This compound matters for its broad-spectrum efficacy against bacteria, fungi, and algae, offering a critical solution for microbial control in water-based systems. It is primarily needed by manufacturers in the water treatment, paint and coating, personal care, and industrial preservation sectors seeking reliable and effective microbiological protection.

Application

• Industrial Water Treatment: As a key biocide in cooling towers, process water, and paper mill systems to prevent biofouling and microbial-induced corrosion.
• Paints, Coatings, and Adhesives: An in-can preservative to extend shelf life by preventing spoilage from bacteria and fungi during storage.
• Personal Care and Cosmetics: Used as a preservative in rinse-off and certain leave-on formulations, such as shampoos and liquid soaps, subject to regional regulatory approvals and concentration limits.
• Metalworking Fluids: Preservation of synthetic and semi-synthetic fluids against microbial degradation.
• Household and Institutional Cleaners: Preservation of liquid detergents and cleaning products.
• Oilfield Applications: Microbial control in drilling muds, fracturing fluids, and produced water.
• Research and Development: Serves as a reference standard and active ingredient for developing new preservation systems and efficacy studies.

Basic Information

Product Name	2-Methyl-4-Isothiazolin-3-One Hydrochloride
CAS No.	26172-54-3
Molecular Formula	C4H5NOS•HCl
Molecular Weight	151.61 g/mol
Synonyms	MIT Hydrochloride; 2-Methyl-3(2H)-isothiazolone hydrochloride; 2-Methyl-4-isothiazolin-3-one HCl; 2-Methyl-1,2-thiazol-3(2H)-one hydrochloride; Neolone 950 HCl; Kathon 886 MW; Isothiazolinone biocide salt; 3(2H)-Isothiazolone, 2-methyl-, hydrochloride
EINECS	247-500-7

Quality Control

Our 2-Methyl-4-Isothiazolin-3-One Hydrochloride is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and potency. Certificates of Analysis (COA) documenting results for assay, related substances, and other critical parameters are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%
pH (1% aqueous solution)	2.0 - 4.0

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