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Material Registration

USDA Organic Logo

The National List of Allowed and Prohibited Substances identifies substances that may and may not be used in organic production and handling. ISDA verifies that materials (fertilizers, livestock feed additives, sanitizers, etc.) used by operations, certified organic by the ISDA, comply with the national organic regulations. In addition, the ISDA maintains a Material Registration List of materials that have been reviewed and approved for use in organic production. Materials approved by the ISDA may display the Approved for Organic Production seal.


Material manufacturers, who wish to have their products reviewed and published on our list, please complete the application, and submit along with the application fee deposit and supporting documents to this office.

Application For Material Registration

Please contact us to request a printed copy or for help completing the forms.


Organic operations are required to list all materials used in production and handling on their Organic System Plan(s). In general, synthetic substances are prohibited unless specifically allowed and non-synthetic substances are allowed unless specifically prohibited. In addition to the National List and the ISDA list, the following organizations may be referenced in search for materials approved for use in organic production:

Organic Material Review Institute. The Organic Materials Review Institute (OMRI) publishes two lists: the OMRI Generic Materials List, which contains over 900 materials and their statuses in organic production, processing, and handling, and the OMRI Products List©, which contains over 2,800 products that have been reviewed and approved for use in organic production.

Washington State Department of Agriculture. The Washington State Department of Agriculture also publishes a list of products they have reviewed and approved for use in organic production.

Environmental Protection Agency. The Environmental Protection Agency (EPA) offers a voluntary program for registering pesticides that indicate for use in organic production.

Be sure you receive approval by this office prior to the use of any material not currently listed on your organic system plan. Please contact us for further assistance.