TOTC

Chemicals and chemical materials used in industry, science and agriculture, namely, magnesium hydroxide, magnesium oxide, calcium oxide; chemicals used in deposition, namely, chemical source material for the deposition of thin films; magnesium oxide ceramics in particle and compacted form used as target material for sputtering, electron-beam deposition, evacuated deposition; ceramic materials in particle and compacted form used as target material for sputtering, electron-beam deposition, evacuated deposition; ceramic materials for industrial use in powder, particle, and granular form

Electrical insulating materials; ceramic electrical insulators

bricks; refractory products not of metal, namely, ramming mixes, refractory castable mixes, fired refractory materials, ceramic shapes for use in refractory furnaces, refractory blocks, all not of metal