Chemicals and chemical materials used in industry, science and agriculture, namely, (( magnesium hydroxide, )) magnesium oxide, [ magnesium carbonate, calcium hydroxide, ] (( calcium oxide, )) [ calcium carbonate, zirconium oxide, calcium sulfite, calcium peroxide, silicon carbide, silicon nitride; ] [ chemicals used in deposition, namely, chemical source material for the deposition of thin films; ] [ adhesives, not for stationery or household purposes; plant growth regulating preparations ]