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
Purity Percentage97
Purity Details97-100.5%
Solubility in Water667 g/l (20 °C)
Upper Explosion LimitNot applicable
Vapor PressureNegligible
ViscosityNo data available
pH-Value3.5-5.0 at 50 g/l (20 °C)
Product LinePuriss.
Storage TemperatureAmbient

Safety Information

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