Ph. Eur. Reference Standards are required to verify compliance with the legal requirements of the European Pharmacopoeia. The Ph. Eur. portfolio comprises nearly 3 000 RS (chemical, biological and herbal) used in more than 120 countries. Quality and scientific excellence guide their establishment. Ph. Eur. Reference Standards are developed through the technical expertise of the EDQM: ISO 9001 certified and ISO 17025 accredited. Users have access both to dedicated customer support through the EDQM’s Online HelpDesk and to specific training resources.