1.05057
Potassium disulfite
for analysis EMSURE®
Synonym(s):
Potassium disulfite, Potassium metabisulfite, Potassium pyrosulfite
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| Size/SKU | Availability | Price |
|---|---|---|
500 g | Check Cart for Availability | $87.70 |
1 kg | Check Cart for Availability | $138.00 |
About This Item
Empirical Formula (Hill Notation):
K2O5S2
CAS Number:
Molecular Weight:
222.32
UNSPSC Code:
12352302
EC Index Number:
240-795-3
NACRES:
NA.21
MDL number:
Assay:
≥96% (iodometric)
Grade:
reagent grade
Form:
solid
Solubility:
450 g/L
Quality Segment
grade
reagent grade
product line
EMSURE®
assay
≥96% (iodometric)
form
solid
potency
2300 mg/kg LD50, oral (Rat)
impurities
≤0.005% In water insoluble matter
pH
3.0-4.5 (20 °C, 50 g/L in H2O)
mp
150 °C (decomposition)
solubility
450 g/L
bulk density
1000‑1300 kg/m3
anion traces
chloride (Cl-): ≤0.005%
cation traces
As: ≤0.0001%, Cu: ≤0.001%, Fe: ≤0.0005%, Pb: ≤0.001%, Zn: ≤0.001%
storage temp.
2-30°C
SMILES string
[K+].[K+].[S](=O)(=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
Analysis Note
Assay (iodometric): ≥ 96 %
In water insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.005 %
As (Arsenic): ≤ 0.0001 %
Cu (Copper): ≤ 0.001 %
Fe (Iron): ≤ 0.0005 %
Pb (Lead): ≤ 0.001 %
Zn (Zinc): ≤ 0.001 %
In water insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.005 %
As (Arsenic): ≤ 0.0001 %
Cu (Copper): ≤ 0.001 %
Fe (Iron): ≤ 0.0005 %
Pb (Lead): ≤ 0.001 %
Zn (Zinc): ≤ 0.001 %
Legal Information
EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany
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Signal Word
Danger
supp_hazards
Storage Class
13 - Non Combustible Solids
WGK
WGK 1
Hazard Codes
Precautionary Statements
Hazard Classifications
Eye Dam. 1 - Skin Irrit. 2
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