Sigma-Aldrich Sodium Iodide Extra Pure D

vapor density

>1 (vs air)

Quality Level

200

grade

puriss.

assay

99-100.5% (calc. to the dried substance)

form

crystalline

quality

meets analytical specification of pH. Eur., BP, USP

impurities

alkalic reac. Impurities, complies
barium and thiosulfate, complies
organic volatile impurities, complies (GC)
residual solvents, in accordance
≤0.0005% heavy metals (as Pb)
≤0.003% total nitrogen (N)
≤0.005% thiosulfate (S₂O₃)
≤0.02% free alkali (as NaOH)
≤2% water (Karl Fischer)

loss

≤2% loss on drying, 105 °C

pH

6-9 (20 °C, 50 g/L)

mp

661 °C (lit.)