12619
Fluka

Potassium disulfite

SKU
12619
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
General Information:
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Brand
Fluka
UNSPSC Code
12352300
CAS Numbers (All) EC Number Linear Formula
K2S2O5
MDL Number Molar Mass
222.32 g/mol
RTECS Number
TT4920000
Synonyms
Potassium metabisulfite; Potassium pyrosulfite

Documents

Specifications

PropertyValue
Assay (Iodometric)95.0 - 101.0 %
Assay of Sulfur Dioxide51.8 - 57.6 %
pH (5 %, 20°C)3.5 - 4.5
Arsenic (As)max. 2 ppm
Copper (Cu)max. 0.002 %
Iron (Fe)max. 5 ppm
Mercury (Hg)max. 1 ppm
Lead (Pb)max. 2 ppm
Selenium (Se)max. 2.5 ppm
Zinc (Zn)max. 20 ppm
Heavy metals (as Pb)max. 10 ppm
Chloride (Cl)max. 0.01 %
Thiosulfate (S2O3)max. 0.05 %
Thiosulfate (S2O3)complying
Appearance of the solutioncomplying
Residual solventscomplying

Properties

PropertyValue
Boiling Point/RangeNot applicable
ColorWhite
Density2.3 g/cm3 (20 °C)
FlashpointNot applicable
FormPowder
GradeReagent Pharmacopeia Salts
Incompatible MaterialsOxidizing agents, Contact with strong acids liberates sulphur dioxide
Lower Explosion LimitNot applicable
Melting Point/RangeDecomposes without melting.
Partition CoefficientNot applicable
Product LinePuriss.
Solubility in Water495 g/l (25 °C)
Storage TemperatureAmbient
Upper Explosion LimitNot applicable
Vapor PressureNegligible
ViscosityNot applicable
pH-Value3-4.5 at 22.2 g/l

Safety Information

PropertyValue
Hazard ClassN/A
Package GroupN/A
UN IDN/A
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