21 CFR 172.399 - Zinc methionine sulfate.

Regulations most recently checked for updates: Aug 28, 2025

§ 172.399 - Zinc methionine sulfate.

Zinc methionine sulfate, CAS Reg. No. 56329-42-1, may be safely used in accordance with the following prescribed conditions:

(a) The additive is the product of the reaction between equimolar amounts of zinc sulfate and DL-methionine in purified water.

(b) The additive meets the following specifications:

Zinc content—19 to 22 percent.

C5H11NO2S “DL-methionine”—46 to 50 percent.

Cadmium—not more than 0.05 part per million.

[46 FR 58297, Dec. 1, 1981]