# The Toys (Safety) Regulations 2011, Paragraph 4


Toys and, in particular, chemical games and toys, must not contain as such substances or mixtures:
(a) which, when mixed together, may explode through chemical reaction or through heating;
(b) which may explode when mixed with oxidizing substances; or
(c) which contain volatile components which are flammable in air and liable to form a flammable or explosive vapour/air mixture.

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Source: https://www.legislation.gov.uk/uksi/2011/1881/schedule/2/part/2/paragraph/4 (the official version)
Page: https://openlegislation.uk/toys-safety-regulations-2011/schedule-2/part-2/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.