chemical elements and their compounds in the natural state or obtained by any production process, including any additive necessary to preserve the stability of the product and any impurites deriving from the process used, but excluding any solvent which can be separated without affecting the stability of the substance or changing its composition[SOURCE: GHS:2017, Chapter 1.2, [8] modified by replacing may by can]

two or more substances, that share at least one chemical sub-structure, or chemical or physical property under a generic name

substance that meets specified criteria for reporting

substance group that meets specified criteria for reporting

list of declarable substances and/or declarable substance groups each with a reporting threshold for a reportable application(s) which has a mandatory or optional reporting requirement when contained at or above its maximum threshold value within a product, product part or material

any substances classified as presenting an environmental hazard according to the UN Globally Harmonized System for Classification and Labeling of Chemicals and its amendments (GHS), 3rd revised edition, Part 4, whilst meeting the criteria of labeling with the environmental hazard pictogram[SOURCE: ISO 18602:2012, definition 3.12]