Product Overview
1,2-Benzisothiazol-3(2H)-one, commonly known as Benzisothiazolinone (BIT), is a heterocyclic organic compound containing sulfur, nitrogen, and oxygen. It is widely used as an antimicrobial preservative in industrial applications.
BIT helps inhibit the growth of bacteria, fungi, and other microorganisms in compatible formulations. It is commonly incorporated into water-based products to help protect them against microbial contamination during storage and use.
Typical application areas include water-based paints and coatings, adhesives, industrial cleaning products, detergents, and other formulated products. The appropriate concentration and application conditions depend on the formulation, regulatory requirements, and supplier recommendations.

Main Applications
Paints and Coatings: Used as a preservative in suitable water-based paint and coating formulations.
Adhesives and Sealants: Helps protect compatible formulations against microbial contamination.
Detergents and Cleaning Products: Used in certain industrial cleaning and detergent formulations.
Industrial Products: Applied in water-based industrial products requiring microbial protection.
Chemical Formulations: Used as an antimicrobial ingredient in selected formulated products.
1,2-Benzisothiazol-3(2H)-one Chemical Properties
Melting point | 154-158 °C(lit.) |
Boiling point | 360°C (rough estimate) |
density | 1.2170 (rough estimate) |
vapor pressure | 0Pa at 25℃ |
refractive index | 1.5500 (estimate) |
storage temp. | Keep in dark place,Sealed in dry,Room Temperature |
solubility | Soluble in dichloromethane, dimethyl sulfoxide, methanol. |
pka | 10.19±0.20(Predicted) |
color | White to Light yellow to Light orange |
Water Solubility | 1.288g/L at 20℃ |
InChIKey | DMSMPAJRVJJAGA-UHFFFAOYSA-N |
LogP | 0.7 at 20℃ |
CAS DataBase Reference | 2634-33-5 |
EPA Substance Registry System | 1,2-Benzisothiazolin-3-one (2634-33-5) |
Safety Information
Hazard Codes | Xn,N |
Risk Statements | 22-38-41-43-50 |
Safety Statements | 24-26-37/39-61 |
RIDADR | UN 3077 9/PG 3 |
WGK Germany | 2 |
RTECS | DE4620000 |
HazardClass | 9 |
HazardClass | IRRITANT |
PackingGroup | Ⅲ |
HS Code | 29339900 |
Hazardous Substances Data | 2634-33-5(Hazardous Substances Data) |
Toxicity | LD50 oral in rat: 1020mg/kg |