which these data are stored for easy data sharing. IUCLID 5 will be the first application fully implementing this international reporting standard, which has been accepted by many national and international regulatory authorities. Numerous parties were involved in the creation and the review of the OECD Harmonized Templates, among them the Business and Industry Advisory Committee (BIAC) to the OECD, the European Chemical Industry Council (CEFIC) and other bodies and authorities. IUCLID5 can be used to enter robust study summaries summarising toxicologically-relevant endpoints. A Klimisch score is assigned within robust study summary as one field. Possible IUCLID 5 uses Anyone can use a local IUCLID 5 installation to collect, store, maintain and exchange relevant data on chemical substances. In addition to dossier creation for REACH, IUCLID 5 data can be (re-)used for a large number of other purposes, due to the compatibility of IUCLID 5 data with the OECD Harmonized Templates. The European Commission IUCLID project team and international authorities are currently in deliberation in order to further promote acceptance of IUCLID5 data in non-REACH jurisdictions. Legislations and programmes under which IUCLID 5 data are certainly accepted are: OECD Chemical Assessment Programme US HPV Challenge Programme Japan HPV Challenge Programme (provided OECD guidance for SIDS dossiers is followed there). The IUCLID 5 data model also features Biocides/Pesticides elements. A dataset prepared for a substance under REACH can therefore be quickly complemented with data about possible biocidal or pesticidal properties and be re-used for data reporting obligations under the EU Biocides regulation. The data are available and can be searched through the OECD eChemPortal. Technology IUCLID development and deployment IUCLID 5 is a Java-based application, using the Hibernate framework for persistence. It features a Java Swing graphical user interface (GUI) and can be deployed on both single workstation and distributed environments. IUCLID 5 offers the possibility to be deployed in: either a 100% open source system environment, using Tomcat as web container and PostgreSQL as Database Management System (DBMS), or a commercial system environment, using the Oracle WebLogic Server from Oracle Corporation as application server and/or Oracle as Database Management System (DBMS). .i5z files IUCLID 5 exports and imports files in the I5Z format. Files may be swapped between different IUCLID 5 installations and dossiers may be uploaded to ECHA via REACH-IT. I5Z stands for "IUCLID 5 Zip", as the file uses Zip file compression. IUCLID 5 system requirements IUCLID can