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Benzisothiazolinone, BIT Biocide

CAS No.: 2634-33-5

Molecular Formula: C7H5NOS

Molecular Weight:151.18

Structural Formula:




Benzisothiazolinone (BIT) is an important bactericide and antiseptic. The BIT biocide can restrain microbe (fungi, germ, algae, etc.) growing in an organic medium. It also can resolve any problem caused by microbe growing in an organic product. Such as mildewing, degeneration, go bad.

Benzisothiazolinone (BIT) is stable over a broad pH range of 4–12 and a broad temperature range. BIT biocide is miscible in water and most of low alcohols and glycols. BIT has low poison, no irritation to eyes and skin.


AppearanceSlight yellow powder
Purity (HPLC)≥ 98%
Water≤ 15%
Melting point155-158°C
pH (1% solution)8.0-10


Benzisothiazolinone, miscible in water and of low toxicity. BIT biocide can be used to control the growth of microorganisms in emulsion paints, adhesives, concrete additives, and other water treatment formulations.

Using quantum: 0.03-0.3% (w/w)

Package and Storage

Packed in 25kg fiber drum.


BIT, 1 2-Benzisothiazolin-3-One, 1,2-Benzisothiazolin-3(2H)-one, Proxan, Proxel, Proxil.

If you have any problems, just navigate to this post — Five Frequently Asked Questions About Benzisothiazolinone.

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