等级

ACS reagent

质量水平

200

蒸汽压

1 mmHg ( 745 °C)

方案

≥99.0%

表单

crystals

杂质

≤0.001% N compounds
≤0.005% insolubles

缺失

≤0.2% loss on drying

pH值（酸碱度）

6.0-9.2 (25 °C, 5%)

mp

681 °C (lit.)

痕量阴离子

chloride, bromide (as Cl)-: ≤0.01%
iodate (IO3-): ≤3 ppm
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.005%

痕量阳离子

Ba: ≤0.002%
Ca: ≤0.002%
Fe: ≤3 ppm
Mg: ≤0.001%
Na: ≤0.005%