Specification Test Results

• For Laboratory,Research,or Manufacturing Use:
  99.5 - 101.0 %
• Assay (Na₂S₂O₃·5H₂O):
  99.5 - 101.0 %
• Appearance (colorless, transparent crystals):
  Passes Test
• Insoluble Matter:
  ≤0.005 %
• Nitrogen Compounds (as N):
  ≤0.002 %
• pH of 5% Solution at 25°C:
  6.0 - 8.4
• Solubility:
  Passes Test
• Sulfate and Sulfite (as SO₄):
  ≤0.1 %
• Sulfide (S):
  Passes Test