Potassium disulfite

puriss.

100

95.0-101.0% (iodometric)

powder

meets analytical specification of Ph.Eur., BP, NF, FCC, E224

organic volatile impurities, complies (GC), residual solvents, in accordance, ≤0.001% heavy metals (as Pb), ≤0.08% thiosulfate (S₂O₃), 51.8-57.6% sulfur dioxide

3.5-4.5 (20 °C, 5%)

chloride (Cl^-): ≤100 mg/kg

As: ≤2 mg/kg, Cu: ≤20 mg/kg, Fe: ≤10 mg/kg, Hg: ≤1 mg/kg, Pb: ≤2 mg/kg, Se: ≤5 mg/kg, Zn: ≤20 mg/kg

in accordance for appearance of solution

[K+].[K+].[O-]S(=O)S([O-])(=O)=O

1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2

RWPGFSMJFRPDDP-UHFFFAOYSA-L