Assessment of chemicals

Procedures for Notification of New Chemicals


The OECD Clearing House on New Chemicals (CHNC) brings together representatives of interested governments and the chemical industry working cooperatively to reduce overall burdens associated with new chemical notification reviews, while maintaining the high quality of health and safety decisions for new chemicals.


The CHNC undertakes and facilitates work aimed at streamlining the New Chemicals notification processes:

  • To enhance the exchange of information and work sharing on new chemical notification and assessments; 
  • To facilitate greater mutual recognition of assessments, and 
  • To progress towards mutual acceptance of notifications.


The vision that the Clearing House is working towards is a sustainable world where:

  • Countries can see, understand and accept each others’ decisions aimed at protecting human health and the environment; 
  • Companies can submit one notification and then market globally;
  • Countries and companies are more efficient and effective in their activities related to new chemicals;
  • This world will be achieved within an equivalence framework, if applicable.


The OECD New Chemicals group has been in existence since 1999, first as the New Chemicals Task Force, and now as the Clearing House on New Chemicals. The work of the Clearing House is focused on three major areas:

  1. Developing and implementing work sharing arrangements to progress towards mutual acceptance of notifications.
  2. Working towards common approaches for notification, particularly for substances which are either exempt from notification or subject to reduced regulatory requirements.
  3. Making notifications more efficient and effective through electronic tools: The Clearing House is currently working on the creation of a software tool to assist in the generation of hard copy and electronic forms needed for notifying new chemical substances.  The tool will enable a notifier to collect and store the necessary information for preparation of a variety of dossiers, as well as import such information from existing electronic sources. It would allow users to output the information to populate the appropriate fields in forms for submission in all of the economies’ formats or transmit the data electronically as required.



The OECD brings together government officials and stakeholders who review and assess notifications from companies who wish to market new chemicals and explores ways to share such work and harmonize activities to reduce work for governments and costs for industry.



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