Magnesium products preferred supplier 1.Main content:98%~99.5% 2.size:0.1-1mm,0.2-3mm,1-4mm ... weighting agent for cotton and silk, filling for ceiba product. (5)Used for grass-making, fertilizer, porcelain, paint, match, detonator ... minMg 9.81%minPH 5—9Chloride (CL) 0.02%maxFerron (Fe) 0.002%maxArsenic (As) 0.0002%maxHeavy Metal (Pb) 0. ... off before delivery is also allowed. Magnesium Sulfate 99.5% min