Janus Green B

Title: Janus Green B
CAS Registry Number: 2869-83-2
CAS Name: 3-(Diethylamino)-7-[[4-(dimethylamino)phenyl]azo]-5-phenylphenazinium chloride
Additional Names: C.I. 11050
Molecular Formula: C30H31ClN6
Molecular Weight: 511.06
Percent Composition: C 70.50%, H 6.11%, Cl 6.94%, N 16.44%
Literature References: Prepd by diazotizing 3-amino-7-(diethylamino)-5-phenylphenazinium chloride (N,N-diethylphenosafranine) and coupling resulting diazo compd with N,N-dimethylaniline: Colour Index vol. 4 (3rd ed., 1971) p 4015.
Use: As dye for cotton, wool; as biological stain; in electrodeposition of copper, Brown, Fellows, US 2882209 (1959 to Udylite Res. Corp.).
Japan Wax Japonilure Jasmolins Jasmone Jasmonic Acid

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
 N (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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.