21 CFR § 573.620 - Menadione dimethylpyrimidinol bisulfite.

---
identifier: "/us/cfr/t21/s573.620"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 573.620 - Menadione dimethylpyrimidinol bisulfite."
title_number: 21
title_name: "Food and Drugs"
section_number: "573.620"
section_name: "Menadione dimethylpyrimidinol bisulfite."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "E"
subchapter_name: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_number: "573"
part_name: "FOOD ADDITIVES PERMITTED IN FEED AND DRINKING WATER OF ANIMALS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321, 342, 348."
regulatory_source: "41 FR 38652, Sept. 10, 1976, unless otherwise noted."
cfr_part: "573"
---


# 573.620 Menadione dimethylpyrimidinol bisulfite.

The food additive, menadione dimethylpyrimidinol bisulfite, may be safely used in accordance with the following conditions:

(a) The additive is the 2-hydroxy-4,6-dimethylpyrimidinol salt of menadione (C<sub>1</sub><sub>7</sub>H<sub>1</sub><sub>8</sub>O<sub>6</sub>N<sub>2</sub>S).

(b) The additive is used or intended for use as a nutritional supplement for the prevention of vitamin K deficiency as follows:

(1) In chicken and turkey feed at a level not to exceed 2 grams per ton of complete feed.

(2) In the feed of growing and finishing swine at a level not to exceed 10 grams per ton of feed.

(c) To assure safe use, the label and labeling of the additive shall bear adequate directions for use.