Scientific Opinion on the safety evaluation of the substance, 5-chloro-2-methyl-2H-isothiazol-3-one, mixture with 2-methyl-2H-isothiazol-3-one (3:1), CAS No. 55965-84-9, as a biocide for processing coatings and paper and boards

5-Chloro-2-methyl-2H-isothiazol-3-one, mixture with 2-methyl-2H-isothiazol-3-one (3:1); CAS number 55965-84-9; Ref. No. 43730; Biocide; Coatings; Paper and boards; Safety assessment; Evaluation
First published in the EFSA Journal
19 March 2010
5 March 2010
Scientific Opinion


This scientific opinion of EFSA deals with the risk assessment of the biocide 5-chloro-2-methyl-2H-isothiazol-3-one, mixture with 2-methyl-2H-isothiazol-3-one (3:1), with CAS No. 55965-84-9, REF. No. 43730 for which the CEF Panel concluded that there is no safety concern for the consumer if the maximum residual amount in the finished products does not exceed 25 µg/dm² and the use of the mixture does not result in an anti-microbial effect at the surface of the polymer or on the food itself.

Panel members at the time of adoption

Arturo Anadón, Mona-Lise Binderup, Wilfried Bursch, Laurence Castle, Riccardo Crebelli, Karl-Heinz Engel, Roland Franz, Nathalie Gontard, Thomas Haertlé, Trine Husøy, Klaus-Dieter Jany, Catherine Leclercq, Jean-Claude Lhuguenot, Wim Mennes, Maria Rosaria Milana, Karla Pfaff, Kettil Svensson, Fidel Toldrá, Rosemary Waring, Detlef Wölfle.
Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids
cef-unit [at]
EFSA Journal 2010; 8(3):1541
Question Number
On request from
Bundesamt für Verbraucherschutz und Lebensmittelsicherheit, Germany