Minn. Stat. § 181.63: SALE OR USE OF SILICATE, SILICA DUST, OR SILICON FLOUR FOR CERTAIN PURPOSES.

It shall be unlawful and a misdemeanor in the state of Minnesota to sell or use any materials used in a dry state for dusting the surface of molds to form a separation of the component parts of the mold which contain silicate, silica dust, or silica flour. It shall be the duty of the Department of Labor and Industry to see that the provisions of this section are enforced and to institute proceedings against any employer or other person who shall violate its provisions.