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5,5′-Dithiobis(2-nitrobenzoic acid)

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5,5′-Dithiobis(2-nitrobenzoic acid) Basic information

Product Name:
5,5′-Dithiobis(2-nitrobenzoic acid)
Synonyms:
  • DTNB
  • ellmann's reagent
  • ELLMAN'S REAGENT
  • ELLMANS' REAGENT
  • BIS(3-CARBOXY-4-NITROPHENYL) DISULFIDE
  • 3-CARBOXY-4-NITROPHENYL DISULFIDE
  • Ellmsn'sreagent
  • Bis(3-carboxy-4-nitrophenyl) disulphide~3-Carboxy-4-nitrophenyl disulphide~Ellmans
CAS:
69-78-3
MF:
C14H8N2O8S2
MW:
396.35
EINECS:
200-714-4
Product Categories:
  • marker
  • Phenyls & Phenyl-Het
  • Phenyls & Phenyl-Het
Mol File:
69-78-3.mol
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5,5′-Dithiobis(2-nitrobenzoic acid) Chemical Properties

Melting point:
240-245 °C (dec.)(lit.)
Boiling point:
671.9±55.0 °C(Predicted)
Density 
1.67
refractive index 
1.6900 (estimate)
storage temp. 
Store at RT.
solubility 
Do you have solubility information on this product that you would like to share
pka
1.57±0.25(Predicted)
form 
Yellow solid
Water Solubility 
Soluble in water and ethanol.
Merck 
14,3551
BRN 
1896821
Stability:
Stable. Incompatible with strong bases, strong oxidizing agents.
InChIKey
KIUMMUBSPKGMOY-UHFFFAOYSA-N
CAS DataBase Reference
69-78-3(CAS DataBase Reference)
EPA Substance Registry System
Benzoic acid, 3,3'-dithiobis[6-nitro- (69-78-3)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36
WGK Germany 
3
RTECS 
DG9650000
10
TSCA 
Yes
HS Code 
29309070

MSDS

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5,5′-Dithiobis(2-nitrobenzoic acid) Usage And Synthesis

Chemical Properties

Crystalline

Uses

5,5′-Dithiobis(2-nitrobenzoic acid) is an membrane-impermeant thiol/disulfide exchange blocker. It is also used to quantify the number or concentration of thiol groups in a sample.

Definition

ChEBI: An organic disulfide that results from the formal oxidative dimerisation of 2-nitro-5-thiobenzoic acid. An indicator used to quantify the number or concentration of thiol groups.

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