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A useful DTNB standard
Catalog #: 2482
SKU-Size Size Price Qty
2482-50 50 mg
2482-250 250 mg
2482-1000 1 g
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Product Details

Alternate Name 2-Nitro-5-thiobenzoic acid
Appearance Yellow solid
CAS # 15139-21-6
Molecular Formula C₇H₅NO₄S
Molecular Weight 199.18
Purity ≥98% by HPLC
Solubility H₂O or PBS
SMILES SC1=CC(C(O)=O)=C([N+]([O-])=O)C=C1
InChi InChI=1S/C7H5NO4S/c9-7(10)5-3-4(13)1-2-6(5)8(11)12/h1-3,13H,(H,9,10)
Handling Protect from air and light
Storage Conditions -20°C
Shipping Conditions Gel Pack
USAGE For Research Use Only! Not For Use in Humans.


TNB is a useful standard when using DTNB (Ellman’s reagent) for the quantification of thiol (-SH) groups in a sample.

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