等级

for analytical purposes

质量水平

200

产品线

BioXtra

方案

≥99.0%

表单

powder or crystals

杂质

Insoluble matter, passes filter test

灼烧残渣

<0.01% (as SO4)

缺失

≤1.0% loss on drying, 110°C

pH值（酸碱度）

5.0-6.0 (20 °C, 1 M in H2O)

mp

>280 °C (dec.) (lit.)

溶解性

H2O: 1 M, clear, colorless

密度

1.77 g/mL at 25 °C (lit.)

痕量阴离子

chloride (Cl-): ≤0.001%
nitrate (NO3-): ≤0.001%
phosphate (PO43-): ≤0.0005%

痕量阳离子

Al: ≤0.0005%
As: ≤0.0001%
Ba: ≤0.0005%
Bi: ≤0.0005%
Ca: ≤0.001%
Cd: ≤0.0001%
Co: ≤0.0005%
Cr: ≤0.0005%
Cu: ≤0.0002%
Fe: ≤0.0002%
K: ≤0.005%
Li: ≤0.0005%
Mg: ≤0.0005%
Mn: ≤0.0005%
Mo: ≤0.0005%
Na: ≤0.005%
Ni: ≤0.0005%
Pb: ≤0.0002%
Sr: ≤0.0005%
Zn: ≤0.0001%

吸附

≤0.030 at 280 in H2O at 1 M
≤0.037 at 260 in H2O at 1 M