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IUPAC name 1,2-­Benzisothiazol-3(2H)­one
Other names Benzisothiazolinone, Benzisothiazolin-3-one, Benzisothiazolone
Molecular formula C7H5NOS
Abbreviations BIT
CAS number 2634-33-5
Molar mass 151.18 g/mol
Appearance white powder
Melting point

158 °C [1]

Solubility in water 1 g/l
Main hazards Xn, N [1]
R-phrases R22, R38, R41, R43, R50 [1]
S-phrases (S2), S24, S26, S37/39, S61 [1]
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Benzisothiazolinone (BIT) is a widely used biocide and belongs to the group of isothiazolinones.


Benzisothiazolinone has a microbicide and a fungicide mode of action. It is used as a preservative in emulsion paints, varnishes, adhesives, washing agents, fuels and in the papermaking process. In paints, it is commonly used as a mixture with methylisothiazolinone. Typical concentrations in products are 200–400 ppm depending on the application area and the combination with other biocides. According to a study in Switzerland, 19% of the paints, varnishes and coatings contained BIT in 2000. The fraction in adhesives, sealants, plasters and fillers was 25%. [2]


  1. ^ a b c d Record of 1,2-Benzisothiazol-3(2H)-one in the GESTIS Substance Database from the BGIA, accessed on 22 October 2007
  2. ^ Reinhard et al.: "Preservation of products with MCI/MI in Switzerland". Contact Dermatitis. 2001 Nov;45(5):257-64. PMID 11722483


  • Wilfried Paulus: Directory of Microbicides for the Protection of Materials and Processes. Springer Netherland, Berlin 2006, ISBN 1-402-04861-0.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Benzisothiazolinone". A list of authors is available in Wikipedia.
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