Janus Green B

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Janus Green B[1]
Janus green B.svg
Ball-and-stick model of the component ions of Janus Green B
IUPAC name
8-(4-Dimethylaminophenyl)diazenyl-N,N-diethyl-10-phenylphenazin-10-ium-2-amine chloride
Other names
Diazin Green S
Union Green B
2869-83-2 N
ChEBI CHEBI:21184 YesY
ChemSpider 68607 YesY
EC number 220-695-6
Jmol-3D images Image
PubChem 76123
Molar mass 511.06 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 N verify (what isYesY/N?)
Infobox references

Janus Green B is a basic dye and vital stain used in histology. It is also used to stain mitochondria supravitally, as was introduced by Leonor Michaelis around 1900.

The indicator Janus Green B changes colour according to the amount of oxygen present.[2] When oxygen is present, the indicator oxidizes to a blue colour. In the absence of oxygen, the indicator is reduced and changes to a pink colour.