Iodonitrotetrazolium chloride Chemical Properties

Melting point:

240 °C (dec.)(lit.)

storage temp. 

2-8°C

solubility 

methanol: water (1:1): 50 mg/mL hot, very faintly turbid, very deep yellow

form 

Powder, Crystals and/or Chunks

color 

White to off-white

Water Solubility 

soluble

Sensitive 

Light Sensitive

λmax

248nm

BRN 

4093224

Stability:

Stable. Incompatible with strong oxidizing agents.

Biological Applications

Bacterial vaginosis diagnosis assay; dehydrogenase enzyme assay; diagnostic assay; food and beverage analytes assays; microbial growth assay; detecting bacteria,yeast,fungi,gamma-hydroxybutyric acid (GHB),microbial growth; measuring niacin,bacterial respiratory activity,superoxide dismutase;treating cancer

InChI

InChI=1S/C19H13IN5O2.ClH/c20-15-6-8-16(9-7-15)23-21-19(14-4-2-1-3-5-14)22-24(23)17-10-12-18(13-11-17)25(26)27;/h1-13H;1H/q+1;/p-1

InChIKey

JORABGDXCIBAFL-UHFFFAOYSA-M

SMILES

[N+]1(=NC(C2C=CC=CC=2)=NN1C1C=CC(I)=CC=1)C1=CC=C([N+]([O-])=O)C=C1.[Cl-]

CAS DataBase Reference

146-68-9(CAS DataBase Reference)

EPA Substance Registry System

2H-Tetrazolium, 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-, chloride (146-68-9)

Safety Information

Hazard Codes 

Xn,F,Xi

Risk Statements 

20/21/22-68/20/21/22-36/37/38-11

Safety Statements 

36/37-36/37/39-26-22-16

RIDADR 

2811

WGK Germany 

3

F 

3-8-10

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

III

HS Code 

29339900

MSDS

• Language:English Provider:2-(4-Iodophenyl)-3-(4-nitrophenyl)-5-phenyltetrazolium chloride
• Language:English Provider:SigmaAldrich

Iodonitrotetrazolium chloride Usage And Synthesis

Description

Iodonitrotetrazolium (INT) (chloride) is a monotetrazolium salt used as an indicator dye. It is reduced to an insoluble formazan that is used as a vital dye or indicator of cellular redox activity. Reduction commonly results from the activity of dehydrogenases, although non-enzymatic electron transfer reactions can occur in the presence of an intermediate electron acceptor. INT is commonly used to measure the respiratory activity of microorganisms in a variety of contexts.

Chemical Properties

slightly yellow powder

Uses

Electron acceptor for the colorimetric assay of various dehydrogenases.

Uses

Iodonitrotetrazolium chloride (INT) on reduction gets converted to iodonitrotetrazolium formazan, a water insoluble violet colored dye or indicator. Hence INT can be used for the colorimetric assay of various dehydrogenases.

Uses

Iodonitrotetrazolium chloride has been used for the staining of cells. It has been used as a coupling agent in the enzymatic assay of D-arabinitol.

Definition

ChEBI: An organic chloride salt having iodonitrotetrazolium as the counterion.

Safety

Iodonitrotetrazolium chloride could cause skin irritation, serious eye irritation, and may cause respiratory irritation.

Properties and Applications

INT (Iodonitrotetrazolium chloride), similar to tetrazolium chloride on reduction, produces a red formazan dye that can be used for quantitative redox assays. It is also toxic to prokaryotes.INT is an artificial electron acceptor that can be utilized in a colorimetric assay to determine protein concentration in a solution. It can be reduced by succinate dehydrogenase to furazan, the formation of which can be measured by absorbance at 490 nm. The activity of succinate dehydrogenase is readily observed by the naked eye as the solution turns from colorless to rusty red.

Purification Methods

Recrystallise the chloride from H2O, aqueous EtOH or EtOH/Et2O. Alternatively, dissolve it in the minimum volume of EtOH and add Et2O; or dissolve it in hot H2O (charcoal), filter and precipitate it by adding conc HCl. Filter the solid off and dry it at 100o. Its solubility in H2O at 25o is 0.5%, and in hot MeOH/H2O (1:1) it is 5%. [Fox & Atkinson J Am Chem Soc 72 3629 1950, Beilstein 26 III/IV 1776.]

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