等级

ACS reagent

质量水平

200

检测方案

≥99%

旋光性

[α]20/D +26°, c = 1 in H2O

杂质

≤0.005% insolubles

缺失

15.61-15.71% loss on drying

pH值（酸碱度）

7.0-9.0

痕量阴离子

chloride (Cl-): ≤5 ppm
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.005%

痕量阳离子

Ca: ≤0.01%
Fe: ≤0.001%
NH4+: ≤0.003%
heavy metals: ≤5 ppm