This document specifies requirements and a test method for determining the content of certain isothiazolinones in aqueous (toy) materials of toys intended for use by children under 36 month or intended to be placed in the mouth. NOTE The European Commission Guidance Document No 11 on the Application of Directive 2009/48/EC on the Safety of Toys [4] provides guidelines to help on the classification of toys intended for children under 36 months of age or of 36 months and over.