This Technical Specification gives a test method for determining the amounts of dimethyl fumarate (DMFU) in footwear materials, desiccant sachets and other commodities. The test method is not applicable to metal parts. The materials to which it is applicable are given in ISO/TR 16178:2012, Table 1. NOTE In Europe, DMFU is prohibited in biocidal products as per Directive 98/8/EC. The substance must be used with caution to avoid any health problems in the chemistry laboratory. More recently, EU Commission Decision 2009/251/ EC requires EU member states to ensure that products containing the biocide DMFU are not placed or made available on the market in the European Union. Decision 2009/251/EC establishes a maximum concentration of DMFU in products and parts of products of 0,1 mg/kg.