ISO 8124-11:2019 specifies requirements and test methods for the substances and materials used in chemical toys (sets) other than experimental sets. These substances and mixtures are:— those classified as dangerous by the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)[1];— substances and mixtures which in excessive amounts could harm the health of the children using them and which are not classified as dangerous by the GHS; and— any other chemical substance(s) and mixture(s) delivered with the chemical toy.Additionally, requirements are specified for markings, warnings, safety rules, contents lists, instructions for use and first aid information.This document applies to:— plaster of Paris (gypsum) moulding sets;— oven-hardening plasticised PVC modelling clay sets;— polystyrene granules sets;— embedding sets;— adhesives, paints, lacquers, varnishes, thinners and cleaning agents (solvents) supplied or recommended in model sets.