DTNB

Dithionitrobenzoic Acid A standard reagent for the determination of reactive sulfhydryl groups by absorbance measurements. It is used primarily for the determination of sulfhydryl and disulfide groups in proteins. The color produced is due to the formation of a thio anion, 3-carboxyl-4-nitrothiophenolate.

Molecular Formula: C₁₄H₈N₂O₈S₂

InChI: InChI=1/C14H8N2O8S2/c17-13(18)9-5-7(1-3-11(9)15(21)22)25-26-8-2-4-12(16(23)24)10(6-8)14(19)20/h1-6H,(H,17,18)(H,19,20)/f/h17,19H

InChIKey: InChIKey=KIUMMUBSPKGMOY-FQFUPTBWCW
SMILES: C1=CC(=C(C=C1SSC2=CC(=C(C=C2)[N+](=O)[O-])C(=O)O)C(=O)O)[N+](=O)[O-]

Names:
    BENZOIC ACID, 3,3'-DITHIOBIS(6-NITRO-
    Dithiobisnitrobenzoic acid
    Dithionitrobenzoic acid
    DTNB
    EINECS 200-714-4
    2,2'-Dinitro-5,5'-dithiodibenzoesaeure [German]
    2,2'-Dinitro-5,5'-dithiodibenzoic acid
    3,3'-Dithiobis(6-nitrobenzoic acid)
    3,3'-Dithiobis(6-nitrobenzoic) acid
    5-(3-carboxy-4-nitro-phenyl)disulfanyl-2-nitro-benzoic acid
    69-78-3

Registries:
    PubChem CID 6254
    PubChem ID 149176