The Organic Foods Production Act of 1990 requires the Secretary of Agriculture to establish a National List of Allowed and Prohibited Substances which identifies synthetic substances that may be used, and the nonsynthetic substances that cannot be used, in organic production and handling operations.

Please Note: Substances on this site may not be used in organic production or handling before the effective date of any final rule adding the substance to the National List.

Information on petitioned substances is organized alphabetically by substance name. To view information on petitioned substances, select from the drop down menu below and click Go. A list of substances matching your selection will show below the drop down menu.