21 CFR § 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 (C17H18O6N2S).
(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.