質(zhì)量標準: 項目 分析純
(AR)
純度Purity(Mg) 4.0%~5.0%(絡合法Complexometry)
外觀Appearance 細小,輕的白色粉末
干燥失重Loss on drying <6 %(1 g, 105°C)
重金屬Heavy metals ≤0.001%
痕量分析Trace analysis :
鉛Pb < 10 ppm
氯Cl < 0.1 %
硫酸根SO4 ≤0.5%
砷(As) ≤3mg/kg
硬脂酸和棕櫚酸相對含量stearic and palmitic acid ≥90.0%
硬脂酸Stearic acid ≥40.0%(GC)
品級Grade Ph. Eur., BP
硬脂酸stearic acid ≥40%(GC)
硬脂酸和棕櫚酸stearic and palmitic acid ≥90%
鎂Mg basis (calc on dry sub.) 4.0-5.0%
酸度或堿度acidity or alkalinity, complies
微生物雜質(zhì)microbiological impurity, in accordance
溶劑殘渣residual solvents, complies
干燥損失loss on drying, 105 °C ≤6.0%
酸值acid value 195?210(fatty acid)
氯chloride (Cl-): ≤1000 ppm
硫酸根sulfate (SO42-): ≤5000 ppm
鎘Cd: ≤3 ppm
鎳Ni: ≤5 ppm
鉛Pb: ≤10 ppm
鑒別試驗identity passes test