Wiktionary
benzisothiazolinone
n. (context chemistry English) A biocide of the isothiazolinone group, used as a preservative in paints, varnishes and fuels and in paper-making.
Wikipedia
Benzisothiazolinone
Benzisothiazolinone (BIT) is a widely used biocide and belongs to the group of isothiazolinones.