Indoor Air Guide Values and Biomonitoring Values for Isothiazolones

Methylisothiazolone (MIT) and 5-chloro-methylisothiazolinone (CIT) are active ingredients of biocidal products. They are used – alone or in combination (Kathon™)  – as preservatives in many convenience goods (e.g. cosmetics). They are very often detectable in indoor air. They have inter alia irritating and sensitising properties. The Ad-hoc Working Group for Indoor Air Guide Values and the Human Biomonitoring Commission of the Federal Environment Agency (UBA) are currently evaluating these substances. FoBiG elaborates the scientific background on behalf of the UBA.