5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB) 99%
Supplier: Thermo Fisher Scientific
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About this item
CAS Number:69-78-3
:
Formula:C₁₄H₈N₂O₈S₂
MDL Number:MFCD00007140
:396.36 g/mol
Melting Pt:240…245 °C (dec.)
EINECS:200-714-4
:GHS07
Storage Temperature:Refrigerator
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 %