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

Supplier: Thermo Scientific
Warning

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 88.2 EUR
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

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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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