This Technical Report establishes a list of critical chemical substances potentially present in footwear and footwear components. This Technical Report describes the critical chemical substances, their potential risks, in which materials they could be found, and which test method(s) can be used to quantify them. It does not include requirements; it is the responsibility of the user of this Technical Report to fix his level of acceptance, e.g. using a defined concentration or detection limit or quantification limit, etc. The proposed test methods indicate the state of the art. Some substances do not include a test method, as no normative test method is available at the moment of the publication of this Technical Report. If possible, it will be included in a further revision of this Technical Report. This Technical Report applies to any kind of footwear and footwear material.