5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB) 99%
Supplier: Thermo Scientific
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Warning
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Synonyms:
DTNB, Ellman's reagent, 3,3'-Dithiobis(6-nitrobenzoic acid), 5,5'-Disulphanediylbis(2-nitrobenzoic acid), 2,2'-Dinitro-5,5'-dithiodibenzoic acid
117540050
117540010
117540250
ACRO117540050EA
122
GBP
ACRO117540050
ACRO117540010
ACRO117540250
5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB) 99%
5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB)
Formula:
C₁₄H₈N₂O₈S₂ MW: 396,36 g/mol Melting Pt: 240…245 °C (dec.) Storage Temperature: Refrigerator |
MDL Number:
MFCD00007140 CAS Number: 69-78-3 EINECS: 200-714-4 |
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 % |
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