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5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB) 99%
5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB) 99%
Certificates
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5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB) 99%
Certificates

Specification Test Results

  • Appearance:
    Off-white to yellow Crystalline powder
  • Infrared spectrum:
    Conforms
  • Melting point:
    240 to 245 °C
  • Loss on drying:
    ≤0.5 %
  • Titration with NaOH:
    ≥98.5 %
  • Sulfate (SO4):
    ≤0.005 %
  • Ammonium (NH4):
    ≤0.003 %
  • Barium (Ba):
    ≤0.005 %
  • Calcium (Ca):
    ≤0.01 %
  • Iron (Fe):
    ≤5 ppm
  • Manganese (Mn):
    ≤5 ppm
  • Potassium (K):
    ≤0.005 %
  • Sodium (Na):
    ≤0.005 %
  • Strontium (Sr):
    ≤0.005 %
  • Heavy metals (ICP-OES):
    ≤5 ppm
  • Insoluble matter:
    ≤0.005 %

Specification Test Results

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