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1.06648 Supelco

Sodium sulfate decahydrate

for analysis EMSURE® ACS,Reag. Ph Eur

Synonym: Sodium sulfate decahydrate

  • CAS Number 7727-73-3

  • Empirical Formula (Hill Notation) Na2O4S · 10H2O

  • Molecular Weight 322.20

  •  MDL number MFCD00149189

  •  EC Index Number 231-820-9

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Properties

Quality Level   300
grade   ACS reagent
Agency/Method   reag. Ph. Eur.
assay   ≥99.0% (alkalimetric)
  98.5-101% dry basis (alkalimetric)
form   crystals
pH   5.2-8.0 (25 °C, 50 g/L in H2O, anhydrous substance)
mp   32.4 °C
density   1.464 g/cm3
bulk density   700 kg/m3
anion traces   chloride (Cl-): ≤0.0003%
  phosphate (PO43-): ≤0.0005%
cation traces   As: ≤ 0.0001%
  Ca: ≤ 0.002%
  Fe: ≤ 0.0005%
  K: ≤ 0.002%
  Mg: ≤ 0.001%
  N: ≤ 0.0003%
  heavy metals (as Pb): ≤ 0.0003%
InChI   1S/2Na.H2O4S.10H2O/c;;1-5(2,3)4;;;;;;;;;;/h;;(H2,1,2,3,4);10*1H2/q2*+1;;;;;;;;;;;/p-2
InChI key   RSIJVJUOQBWMIM-UHFFFAOYSA-L
storage conditions   Store at +15°C to +25°C.

Description

Analysis Note

Assay (alkalimetric): ≥ 99.0 %
Assay (alkalimetric, calculated on dried substance): 98.5 - 101.0 %
Identity: passes test
Appearance of solution: passes test
Insoluble matter: ≤ 0.01 %
pH-value (5 %; water; 25 °C): 5.2 - 8.0
Acidity or alkalinity: passes test
Chloride (Cl): ≤ 0.0003 %
Phosphate (PO₄): ≤ 0.0005 %
Total nitrogen (N): ≤ 0.0003 %
Heavy metals (as Pb): ≤ 0.0003 %
As (Arsenic): ≤ 0.0001 %
Ca (Calcium): ≤ 0.002 %
Fe (Iron): ≤ 0.0005 %
K (Potassium): ≤ 0.002 %
Mg (Magnesium): ≤ 0.001 %
Loss on drying (130 °C): 52.0 - 57.0 %
corresponds to ACS,Reag. Ph Eur

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