---
kind: "section"
citation: "21 C.F.R. § 573.625"
title: "21"
number: "573.625"
heading: "Menadione nicotinamide bisulfite."
url: "https://uscodex.org/cfr/21/573.625"
---

# §573.625. Menadione nicotinamide bisulfite.


The food additive may be safely used as follows:

- (a) The additive is 1,2,3,4-tetrahydro-2-methyl-1,4-dioxo-2-naphthalene sulfonic acid with 3-pyridine carboxylic acid amine (CAS No. 73581-79-0).
- (b) The additive is used or intended for use as a nutritional supplement for both the prevention of vitamin K deficiency and as a source of supplemental niacin as follows:
  - (1) **In chicken and turkey feeds at a level not to exceed 2 grams per ton of complete feed.**
  - (2) **In growing and finishing swine feeds at a level not to exceed 10 grams per ton of complete feed.**
- (c) To assure safe use, the label and labeling of the additive shall bear adequate directions for use.

## Notes

### Amendments

[64 FR 46840, Aug. 27, 1999]

### Authority

Authority: 21 U.S.C. 321, 342, 348.

### Source

Source: 41 FR 38652, Sept. 10, 1976, unless otherwise noted.

### Amendments

[64 FR 46840, Aug. 27, 1999]