The food additive calcium periodate may be safely used in accordance with the following prescribed conditions:
- (a) The additive is produced by reacting calcium iodate with calcium hydroxide or calcium oxide to form a substance consisting of not less than 60 percent by weight of penta calcium orthoperiodate containing 28 to 31 percent by weight of iodine.
- (b) It is used or intended for use in salt for livestock as a source of iodine.