Janus Green B

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Janus Green B[1]
Janus green B.svg
CAS number 2869-83-2 N
PubChem 76123
ChemSpider 68607 YesY
EC number 220-695-6
ChEBI CHEBI:21184 YesY
Jmol-3D images Image 1
Molecular formula C30H31ClN6
Molar mass 511.06 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/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.