This European Standard sets requirements for bio-based surfactants in terms of properties@ limits@ application classes and test methods. It lays down the characteristics and details for assessment of biobased surfactants as to whether they: ?? are fit for purpose in terms of performance related properties; ?? comply with the requirements regarding the health@ safety and environment which apply to general surfactants; ?? are derived from a certain minimum percentage of biomass; and ?? comply with at least similar sustainability criteria as comparable (non-bio-based) surfactants. The criteria of the regulation on Registration@ Evaluation@ Authorization and Restriction of Chemicals (REACH) [11] also apply to bio-based surfactants. NOTE EN 16575 defines the term ??bio-based?? as derived from biomass and clarifies that ??bio-based?? does not imply ??biodegradable??. In addition@ ??biodegradable?? does not necessarily imply the use of ??bio-based?? material.