Specification Test Results

• USP - Assay (K₂HPO₄) (dried basis):
  98.0 - 100.5 %
• USP - Arsenic (As):
  ≤ 3 ppm
• USP - Carbonate (CO₃):
  Passes Test
• USP - Chloride (Cl):
  ≤ 0.03 %
• USP - Fluoride (F):
  ≤ 0.001 %
• USP - Identification A (USP):
  Passes Test
• USP - Identification B (USP):
  Passes Test
• USP - Insoluble Substances:
  ≤ 0.2 %
• USP - Iron (Fe):
  ≤ 0.003 %
• USP - Loss on Drying:
  ≤ 1.0 %
• USP - Mono- or Tri- Basic Salt:
  Passes Test
• USP - pH (1 in 20):
  8.5 - 9.6
• USP - Sodium (Na):
  Passes Test
• USP - Sulfate (SO₄):
  ≤ 0.1 %
• Assay (K₂HPO₄) (by acidimetry):
  ≥ 99.0 %
• Chloride (Cl):
  ≤ 0.003 %
• Fluoride (F):
  ≤ 0.001 %
• Trace Impurities - ACS - Heavy Metals (as Pb):
  ≤ 5 ppm
• Insoluble Matter:
  ≤ 0.01 %
• Trace Impurities - Iron (Fe):
  ≤ 0.001 %
• Loss on Drying at 105°C:
  ≤ 1.0 %
• Nitrogen Compounds (as N):
  ≤ 0.001 %
• pH of 5% Solution at 25°C:
  8.5 - 9.6
• Sodium (Na):
  ≤ 0.05 %
• Sulfate (SO₄):
  ≤ 0.005 %
• Trace Impurities - Arsenic (As):
  ≤ 1 ppm
• Trace Impurities - Lead (Pb):
  ≤ 5 ppm