Sodium thiosulfate pentahydrate 99.5% for analysis

Supplier: Thermo Scientific Chemicals

AC20285-0010 AC20285-0025 AC20285-0100
TS20285-0010EA 67 USD
TS20285-0010 TS20285-0025 TS20285-0100
Sodium thiosulfate pentahydrate 99.5% for analysis
Sodium thiosulphate pentahydrate
Formula: Na₂S₂O₃.5H₂O
MW: 248.19 g/mol
Melting Pt: 48.5 °C
Density: 1.72 g/cm³
Storage Temperature: Ambient
MDL Number: MFCD00149186
CAS Number: 10102-17-7
EINECS: 231-867-5
Merck Index: 12,08844

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Specification Test Results

Appearance Transparent white Crystals
Titration Iodimetric 99.5 to 101.0 %
pH 6.0 to 8.4 (5 % at 25°C)
Chloride (Cl) ≤200 ppm
SO4 and SO3 (as SO4) ≤0.1 %
Calcium (Ca) ≤20 ppm
Iron (Fe) ≤5 ppm
Potassium (K) ≤50 ppm
Sulfur (S) ≤1 ppm
Heavy metals (as Pb) ≤5 ppm
Insoluble matter ≤0.005 % (in water)
Nitrogen compounds (as N) ≤0.002 %

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