The Reregistration Eligibility Document (or RED) discusses the scientific data and other information supporting EPA's regulatory conclusion that products containing a pesticide do not pose unreasonable risks when used as directed by Agency-approved labeling, and are eligible for reregistration. The document presents the Agency's decision regarding the reregistration case inorganic nitrate/nitrite, which covers products containing the active ingredients sodium and potassium nitrates. No registered pesticide products now contain nitrites. The document consists of five sections. Section I is the introduction. Section II describes sodium and potassium nitrates, their uses and regulatory history. Section III discusses the human health and environmental assessments based on the data available to the Agency. Section IV discusses the reregistration decision for sodium and potassium nitrates and Section V discusses product reregistration.