Specification Test Results

• Appearance:
  White to beige Crystals
• Infrared spectrum:
  Conforms
• Assay:
  ≥99.5 %
• Loss on drying:
  ≤10 % (As packed) (3 to 5 g, 105°C, 2 h)
• Heavy metals:
  ≤10 ppm
• Degree of substitution:
  0.65 to 0.90
• Viscosity:
  1500 to 3100 mPa.s (2 % at 25°C) (Brookfield)
• pH:
  6.5 to 8 (1 % solution)
• Sodium chloride (NaCl):
  ≤0.25 %
• Arsenic (As):
  ≤3 ppm
• Cadmium (Cd):
  ≤1 ppm
• Lead (Pb):
  ≤3 ppm
• Mercury (Hg):
  ≤1 ppm
• Impurity:
  ≤0.4 % (Sodium glycolate)