The Poison Centre Notification (PCN) format aims to structure the information on hazardous mixtures classified for health or physical hazards available to poison centres in cases of poisoning incidents in the EU.

The format is XML-based and defined by the harmonised requirements laid out in Annex VIII to the CLP Regulation and is incorporated into the PCN dossier preparation tools offered by ECHA. It is also available for companies to prepare their own tools based on the PCN format, for example when using the system to system service. Regardless of which tools are used to prepare, the format must be adhered to.

The PCN format is compatible with IUCLID, a tool developed by ECHA in collaboration with the OECD, which promotes the harmonisation of chemicals data. You can find additional information about this tool on the IUCLID website.

Download the PCN format

Annual updates of the format occur in October in line with the IUCLID release schedule. The format is made available as a set of XML schema definition files (XSDs). There is also a data model that shows all relevant fields and their interconnections.

• Version 2.0, published on 30 October 2019 (108 KB | .zip);
• Version 3.0 (draft), published on 22 April 2020 (741 KB | .zip), will be released in October 2020.  It includes a Word version of the format elements, a list of all fields and a comparison with version 2.0.
• PCN format picklists: note that the list of picklist values contains most of the IUCLID phrases, including (but not only) the ones relevant for PCN.
  • October 2019 Excel format (321 KB | .xlsx)  and October 2019 XML format (2,138 KB | .xml)

IT Implementation

The Developers' guide to the IUCLID format is available for implementing the PCN format into a company’s own systems.

In IUCLID, the exchange of chemical information is facilitated via a zip/archive file with the extension .i6z (IUCLID 6 zip). The information can be exported from one IUCLID 6 installation and imported into another. This file contains information concerning all (inter)related IUCLID 6 entities (documents and attachments), in a well-defined and structured format. This guide explains the structure of the IUCLID file in order for developers to build systems other than IUCLID 6 which can generate this format.