Working in cooperation with other EU agencies and competent authorities, ECHA has taken the first steps toward establishing a common data platform within the scope of the One Substance, One Assessment (OSOA) package.

With OSOA, ECHA has been assigned a number of new tasks aimed at supporting consistent, predictable, and transparent chemical assessments.

What is OSOA?

One Substance, One Assessment (OSOA) is a legislative package designed to ensure that chemicals are assessed in the same coordinated manner, regardless of their regulatory use. The objective is to ensure consistency in chemical assessments and to enable a faster and more efficient assessment process.

What is the Common Data Platform and what is its purpose?

On 12 December 2025, Regulation (EU) 2025/2455 on the EU Common Data Platform for Chemicals was published in the Official Journal of the European Union. This Regulation announced that a common EU Chemicals Data Platform will be established by 2 January 2029.

Through the common data platform, information that is currently dispersed across different bodies such as ECHA, EFSA, EEA, and EMA will be brought together under a single platform managed by ECHA. In addition, inconsistencies arising from separate assessments of the same chemical by different authorities will be avoided.

Non-confidential data available on the platform that are downloadable and machine-readable will be accessible to the public. Regulatory authorities will have access to confidential data, while companies and third parties will be able to access such data only upon application and under specific conditions.

Common Data Platform Services

Pursuant to Regulation (EU) 2025/2455, the Common Data Platform may be used not only to host data on chemicals, but also to benefit from a range of additional services. These are listed in the Regulation as follows:

  • Information Platform for Chemical Monitoring (IPCHEM)
  • A repository of reference values
  • A database of study notifications
  • A database with information on regulatory processes
  • A database with information on applicable regulatory obligations
  • A repository of standard formats and controlled vocabularies
  • A database of environmental sustainability-related data
  • A database on chemicals in articles or products
  • A database on alternatives to substances of concern
  • A dashboard of indicators on chemicals

    Timeline

    • 12 December 2025 → Publication of Regulation (EU) 2025/2455 in the Official Journal of the EU
    • 2 January 2026 → Entry into force of the Regulation
    • 2 July 2026 → Publication of a detailed plan defining the data sets and the programme for inclusion in the system
    • 2 November 2027 → Start of the obligation for companies to register laboratory studies commissioned by them in the system
    • 2 January 2029 → Full operationalisation of all core data sets on the platform
    • 2 January 2030 → Launch of EU-wide human exposure measurements
    • 2 January 2036 → Completion of the transfer of all historical data generated before 2026 to the platform

    Companies should pay particular attention to 2 November 2027, which is widely considered a key milestone for the implementation of study notification requirements under the Common Data Platform. From this date onwards, tests conducted for regulatory compliance purposes will be required to be registered in the system.

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