Item標準Standard value項目Item標準Standard valueMg(OH)2含量（%）Purity≥97水分（%）Water≤0.3堆積密度（g/ml）Bulk Density≤0.2氧化鈣（%）CaO≤0.30鐵質(zhì)量分數(shù)（%）Fe≤0.1吸油值（ml/100g）Oil obserption value≤100酸不溶物（%）SiO2≤0.10氯化物質(zhì)量分數(shù)Cl- Content（%）≤0.10比表面積（m2/g）Specific surface area＜6激光粒徑（D50）umParticle size≤2SO42-（%）≤0.15篩余物Sieve residue≤0.02白度Whitness≥93灼燒失重質(zhì)量分數(shù)Lgnition loss （%）≥28