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Development and Maintenance

IUCLID 5 is maintained under the responsibility of the European Chemicals Agency (ECHA) and is distributed free of charge.
The current version is IUCLID 5, which was developed during the period 2005-2007 and made public in June 2007. IUCLID 5 is the key tool for chemical industry to fulfil data submission obligations under REACH, a European Union law covering the production and use of chemical substances.


Information on the development and maintenance of IUCLID 5 can be found on this page:

IUCLID 5.6[top]

IUCLID 5.6.0 features new content and fixes. The main purpose for this release is to update the Classification and Labelling section according to the fourth revision of the GHS (incorporated in the fourth update of the CLP Regulation).

Among the improvements included in this version, there is also the possibility to transfer annotations made on one dossier to another dossier.

Files generated with IUCLID 5.6.0 remain compatible with IUCLID 5.5 (and IUCLID 5.4 for REACH data) except when new classification elements introduced in the 4th version of the GHS are used. More details on the changes included in this release and about the compatibility between IUCLID 5.6 and previous IUCLID 5 versions can be found in the presentation 'What is new in IUCLID 5.6?'.

IUCLID 6[top]


The development of version 6 of IUCLID is performed in several steps.

  1. Architecture study and prototyping - end of 2012
  2. IUCLID core development (this includes all IUCLID documents and main IUCLID functions) - 2013
  3. IUCLID configuration (development of regulation-specific documents, dossier creation and implementation of IUCLID add-ons) - 2014
  4. IUCLID format update (update of the IUCLID format according to the most recent OECD Harmonised Templates) - 2015

In terms of release, a beta version will be made available in May 2015 and the official IUCLID 6 version will be published by Summer 2016. To learn more about IUCLID 6 beta version please see the below webinar.

01/04/2015: material from the 13 March webinar on IUCLID 6 distributed version

Webinar 'IUCLID 6 distribution version webinar', held on 13 March 2015

Presentations used during the webinar

Questions and Answers from the webinar


The first version of IUCLID 5 was published in 2007. Since then new challenges have arisen such as:

In addition to these new needs identified, the IT components on which IUCLID relies have evolved and new ones have been introduced on the market that could better support the functional requirements of IUCLID.

IUCLID 6 project

The IUCLID 6 project was initiated at the end of 2012. It started with a pre-analysis study aiming at identifying the new architecture for the IUCLID application and prioritising new user requirements.

The pre-study concluded on a set of technologies to be used with IUCLID 6.

Architectural changes

The architecture of IUCLID will be reviewed to better manage information on large scale systems while, at the same time, simplifying the installation process on workstations.

In order to support all user requirements in the scope of IUCLID 6, a technical solution has been proposed which includes the transition from PostgreSQL to JavaDB for the database type, while Oracle database will continue to be supported. For the application server, a transition from Tomcat to Glassfish has been chosen. The software needed to use IUCLID 6 should be transparent for the user of the workstation version, as the aim is to simplify the installation on small scale systems. However, the changes in terms of software requirements will necessitate preparatory work for the users of the distributed version as IT departments of organisations using the server version of IUCLID will require the skill and expertise relevant to the new technology used.

Main functional requirements

IUCLID 6 should allow the implementation of a number of improvements that were requested for IUCLID 5 but could not be implemented in order, for example:

IUCLID 6 survey (18 March - 5 April 2013)

The purpose of the IUCLID 6 survey is to inform all IUCLID users about the plans for the future of their database and collect feedback on the choices made at an early stage of the project in order to verify to which extent they can be validated to continue with the next phases of the IUCLID 6 development.

With the IUCLID 6 survey, the IUCLID team aims at:

The outcome of the survey is available in a report: IUCLID 6 survey results.

Background information on previous IUCLID versions[top]

Versions 1 to 4


In 2003, when it became clear that the REACH proposal would be adopted sooner or later by the European Union, the European Commission decided to completely overhaul IUCLID 4 and to create a new version, IUCLID5, which is used by chemical industry companies affected by REACH to fulfil their data submission obligations.
IUCLID is also mentioned in article 111 of the REACH legislation as the tool to be used for data collection and submission dossier preparation

IUCLID 5.3 and maintenance releases[top]

The latest major service release of IUCLID (version 5.3) was published on the IUCLID website in February 2011. A first maintenance release (IUCLID 5.3.1) was then released in August 2011 that includes fixes and new improvements.

The IUCLID team is now preparing IUCLID 5.3.2, to be made available to the users by the end of 2011 that will contain the following items:

IUCLID 5.4[top]

IUCLID 5.4 was released in June 2012. As with previous major service releases, a migration step is involved to upgrade from the previous IUCLID main release, but backward compatibility is as always ensured, meaning that all IUCLID documents created with previous versions of IUCLID 5 are still compatible with the latest version.

Amongst all changes introduced in IUCLID 5.4, the main ones are listed hereafter:

IUCLID 5.5[top]

The analysis and design and development work of IUCLID 5.5 followed closely the end of the similar phases of IUCLID 5.4. IUCLID 5.5 has been published in April 2013. After this release, two maintenance releases should be able to be published until the end of 2013 containing bug fixes and functionality improvements.

Important information for the use of IUCLID under the European REACH Regulation: taking into consideration that this new release of IUCLID would be made available less than one year before the important deadline under the REACH Regulation in 2013, it is proposed to apply a new development procedure that would guarantee the full compatibility of the REACH information stored in IUCLID between IUCLID 5.5 and 5.4 versions. This is illustrated in the following picture.

IUCLID compatibility

Data Format and Exchange[top]

Data that can be stored and maintained with IUCLID 5 encompass information about:

OECD and the European Commission have agreed on a standard XML format (OECD Harmonised Templates) in which these data are stored for easy data sharing. IUCLID5 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 Harmonised Templates, among them the Business and Industry Advisory Committee (BIAC) to the OECD, the European Chemical Industry Council (Cefic) and other bodies and authorities.

Possible IUCLID 5 uses[top]

Anyone can use a local IUCLID 5 installation to collect, store, maintain and exchange relevant data on chemical substances.


In the case of a chemical industry company affected by REACH, all relevant IUCLID 5 data can be exported into a REACH dossier to be submitted to the European CHemicals Agency (ECHA).

Other IUCLID 5 uses

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 Harmonised Templates. The European Commission IUCLID 5 project team and international authorities are currently in deliberation in order to further promote acceptance of IUCLID 5 data in non-REACH jurisdictions. Other legislations and programs under which IUCLID 5 data are accepted include:


IUCLID 5 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:

IUCLID System Requirements

IUCLID can be deployed on any current PC. For optimal performance, RAM should not be less than 1 GB

Further Developments on IUCLID 5

Migration Tool 5.1.2

The IUCLID 5 Migration Tool plugin, which converts datasets created with IUCLID 4 into the IUCLID 5 format (i5z file format), was updated on 17.12.2007 and made available for download. The IUCLID 5 download package contains from that date the latest version of the migration tool as well. The core application did not change.

XML Schema for Pre-registration

The Pre-registration XML format format was published on 08.02.2008. This specific format is necessary in order to facilitate and validate the submission of the pre-registration data for REACH.

Pre-registration plugin

This plugin adds the functionality of creating single and bulk pre-registration XML files in a format that can be submitted to the European Chemicals Agency (ECHA).


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