English
grade
ACS reagent
Quality Level
Assay
99.4-100.4% (ACS specification)
99.5%
form
powder
impurities
≤0.005% N compounds
≤0.005% insolubles
pH
5.0-8.0 (25 °C, 5%)
mp
560 °C (lit.)
density
3.93 g/mL at 25 °C (lit.)
anion traces
chloride, bromide (as Cl)-: ≤0.01%
iodide (I-): ≤0.001%
sulfate (SO42-): ≤0.005%
cation traces
Fe: ≤0.001%
Na: ≤0.005%
heavy metals: ≤5 ppm (by ICP-OES)
