13459
Fluka

Sodium metabisulfite

SKU
13459
Puriss., meets analytical specification of BP, FCC, NF, Ph. Eur., E223, dry, 97-100.5%
Synonym(s)
Sodium disulfite; Sodium pyrosulfite
General Information:
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Brand
Fluka
CAS Numbers (All) EC Number Linear Formula
Na2S2O5
MDL Number
Molar Mass
190.11 g/mol
Synonyms
Sodium disulfite; Sodium pyrosulfite

Documents

Specifications

PropertyValue
Assay97.0 - 100.5 %
Assay of Sulfur Dioxide65.0 - 67.4 %
pH (5 %, 20°C)3.5 - 5.0
pH (10% solution)4.0 - 5.0
Arsenic (As)max. 2 ppm
Copper (Cu)max. 0.001 %
Iron (Fe)max. 10 ppm
Mercury (Hg)max. 1 ppm
Lead (Pb)max. 2 ppm
Selenium (Se)max. 5 ppm
Zinc (Zn)max. 0.001 %
Heavy metals (as Pb)max. 10 ppm
Chloride (Cl)max. 0.01 %
Thiosulfate (S2O3)max. 0.02 %
Thiosulfate (S2O3)complying
Appearance of the solutioncomplying
Residual solventscomplying

Properties

PropertyValue
Boiling Point/RangeDecomposes on heating
ColorColorless
Density2.36 g/cm3 (20 °C)
FlashpointNot applicable
FormSolid
GradeReagent Pharmacopeia Salts
Incompatible MaterialsContact with strong acids liberates sulphur dioxide, Oxidizing agents
Lower Explosion LimitNot applicable
Melting Point/Range>150 °C (Decomposes before melting)
Partition Coefficient-3.7
Product LinePuriss.
Purity Percentage97
Purity Details97-100.5%
Solubility in Water667 g/l (20 °C)
Storage TemperatureAmbient
Upper Explosion LimitNot applicable
Vapor PressureNegligible
ViscosityNo data available
pH-Value3.5-5.0 at 50 g/l (20 °C)

Safety Information

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