12619
Potassium disulfite
puriss., meets analytical specification of Ph.Eur., BP, NF, FCC, E224, 95.0-101.0% (iodometric), powder, 51.8-57.6% sulfur dioxide
Synonym(s):
Potassium metabisulfite, Potassium pyrosulfite
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About This Item
grade
puriss.
Quality Segment
assay
95.0-101.0% (iodometric)
form
powder
quality
meets analytical specification of Ph.Eur., BP, NF, FCC, E224
impurities
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
pH
3.5-4.5 (20 °C, 5%)
anion traces
chloride (Cl-): ≤100 mg/kg
cation traces
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
suitability
in accordance for appearance of solution
SMILES string
[K+].[K+].[O-]S(=O)S([O-])(=O)=O
InChI
1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
InChI key
RWPGFSMJFRPDDP-UHFFFAOYSA-L
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signalword
Danger
hcodes
supp_hazards
Storage Class
11 - Combustible Solids
wgk
WGK 1
Hazard Classifications
Eye Dam. 1 - Skin Irrit. 2
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