OMRI Generic Materials List

The OMRI Generic Materials List is a catalog of over 900 substances that are allowed, allowed with restrictions, or prohibited for use in organic agriculture and food processing.

Based on the National Organic Program, the List serves as a reference guide for organic farmers, handlers, processors, inspectors, certifiers, agricultural professionals, and all others with an interest in materials for use in organic production.

With sections for crops, livestock, and processing and handling, materials are alphabetically listed and designated with a status that indicates whether they are Allowed, Restricted, or Prohibited under the NOP Rule. OMRI’s Restricted status indicates use restrictions that are required for a compliant use of the material under the NOP Rule. OMRI developed the Restricted status to flag important regulatory qualifications for the material in question. The individual material entries contain information about the use restrictions.

The OMRI Generic Materials List also includes other useful reference resources. The National Organic Standards Board (NOSB) Appendix lists their recommendations and accompanying annotations that have not completed a final regulatory rulemaking. The Livestock Vitamins and Minerals Appendix lists A-R-P status and provides citations to the applicable regulatory sections under the FDA (Food and Drug Administration) and AAFCO (American Association of Feed Control Officials).

Choose your desired publication format below. You will be able to add a quantity during the ordering process.