Mo. Rev. Stat. § 260.822: Content concentration of certain elements, restrictions.

Except as provided in section 260.824, a manufacturer or distributor may not sell a package, packaging material, or packaging component and a manufacturer or distributor of products in the state of Missouri shall not offer for sale or promotional purposes any package, packaging materials, or any packaging component, with a total concentration of lead, cadmium, mercury and hexavalent chromium that exceeds:

(1) Beginning on July 1, 1994, six hundred parts per million;

(2) Beginning on July 1, 1995, two hundred fifty parts per million; and

(3) Beginning on July 1, 1996, one hundred parts per million.