Sodium thiosulphate pentahydrate 99.5% for analysis

Supplier: Thermo Scientific

ACRO202850025EA 76.2 EUR
ACRO202850025 ACRO202850010 ACRO202850100
Sodium thiosulphate 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
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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