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%
AssayofSulfurDioxide51.8-57.6%
pH(5%,20°C)3.5-4.5
Arsenic(As)Max.2ppm
Copper(Cu)Max.0.002%
Iron(Fe)Max.5ppm
Mercury(Hg)Max.1ppm
Lead(Pb)Max.2ppm
Selenium(Se)Max.2.5ppm
Zinc(Zn)Max.20ppm
Heavymetals(asPb)Max.10ppm
Chloride(Cl)Max.0.01%
Thiosulfate(S2O3)Max.0.05%
Thiosulfate(S2O3)complying
Appearanceofthesolutioncomplying
Residualsolventscomplying

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
Purity Percentage95
Purity Details95.0-101.0%
Solubility in Water495 g/l (25 °C)
Upper Explosion LimitNot applicable
Vapor PressureNegligible
ViscosityNot applicable
pH-Value3-4.5 at 22.2 g/l
Product LinePuriss.
Storage TemperatureAmbient

Safety Information

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