6,6′-Dithiodinicotinic acid

technical grade, 85%

Bis[3-carboxypyridine] 6,6′-disulfide, Bis[3-Carboxypyridine] 6,6′-disulfide
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
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Pricing and availability is not currently available.


technical grade




263-265 °C (lit.)

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General description

6,6′-Dithiodinicotinic acid is reported as sulphydryl reagent. 6,6′-Dithiodinicotinic acid is reported to react with thiols, to afford a disulfide and 6-mercaptonicotinic acid. Interaction of 6,6′-dithiodinicotinic acid with the homogenates of Ehrlich ascites cells has been reported.


6,6′-Dithiodinicotinic acid may be employed as:
  • specific thiol blocker to investigate the radioprotective effect of mercaptoethylamine on the thiol level of the outer cell membrane of the Ehrlich ascites tumor cells
  • modifier to investigate the polar microenvironment around the reactive Cys283 of rabbit muscle creatine kinase
  • dipyridyl-dithio substrate to evaluate the protein disulfide-thiol interchange activity of the auxin stimulated NADH: protein disulfide reductase (NADH oxidase) of soybean plasma membranes
  • water-soluble reagent in a study for introducing, in buffered saline, a reactive sulfhydryl group on water-soluble molecules bearing an alkyl-amino group
  • chromogen for sulfhydryl groups in the Ellman method for cholinesterase determinations
  • spectrophotometric determination of thiols and of total glutathione in human blood


5 g in glass bottle


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Hazard Statements

Precautionary Statements

Target Organs

Respiratory system

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
L Meunier et al.
Bioconjugate chemistry, 10(2), 206-212 (1999-03-17)
A simple method for introducing, in buffered saline, a reactive sulfhydryl group on water-soluble molecules bearing an alkyl-amino group is described. This method is based on the use of two water-soluble reagents: 2-iminothiolane and 6,6'-dithiodinicotinic acid. The first one is...
Metastases limited.
D R Grassetti
Nature, 308(5959), 500-500 (1984-04-05)
M M Konstantinova et al.
Radiobiologiia, 28(3), 364-368 (1988-05-01)
In experiments with Ehrlich ascites tumor cells, using a specific thiol blocker, 6,6'-dithiodinicotinic acid, that does not penetrate the cell and therefore only binds SH-groups of peripheral areas of an external cell membrane, it was demonstrated that (1) the external...
[Quantitation of sulfhydryl groups on surface of erythrocytes].
X B Liu et al.
Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae, 8(2), 146-147 (1986-04-01)
J Nandi et al.
The Biochemical journal, 213(3), 587-594 (1983-09-01)
The distribution of free thiol groups associated with the membrane proteins of the purified pig gastric microsomal vesicles was quantified, and the relation of thiol groups to the function of the gastric (H+ + K+)-transporting ATPase system was investigated. Two...

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