# Magnesium Sulfate; Exemption From the Requirement of a Tolerance
> **Rule** · Final rule. · Published 2020-07-20 · Effective 2020-07-20 · 85 FR 43702
## Document
- **Document number:** 2020-14401
- **Category:** pesticide
- **Federal Register citation:** 85 FR 43702
- **CFR reference:** 40 CFR 180
- **Publication date:** 2020-07-20
- **Effective date:** 2020-07-20
- **EPA docket:** EPA-HQ-OPP-2019-0571
## Abstract

This regulation establishes exemptions from the requirement of a tolerance for residues of magnesium sulfate anhydrous (CAS Reg. No. 7487-88-9); magnesium sulfate monohydrate (CAS Reg. No. 14168-73-1); magnesium sulfate trihydrate (CAS Reg. No. 15320-30-6); magnesium sulfate tetrahydrate (CAS Reg. No. 24378-31-2); magnesium sulfate pentahydrate (CAS Reg. No. 15553-21-6); magnesium sulfate hexahydrate (CAS Reg. No. 17830-18-1); and magnesium sulfate heptahydrate (CAS Reg. No. 10034-99-8), collectively referred to as magnesium sulfate, when used as an inert ingredient in antimicrobial pesticide formulations applied to food-contact surfaces in public eating places, dairy- processing equipment, and food-processing equipment and utensils at an end-use concentration not to exceed 4400 parts per million (ppm). Ecolab, Inc. submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting establishment of exemptions from the requirement of a tolerance for magnesium sulfate. This regulation eliminates the need to establish a maximum permissible level for residues of magnesium sulfate when used in accordance with these exemptions.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/07/20/2020-14401/magnesium-sulfate-exemption-from-the-requirement-of-a-tolerance)
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