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Recipe of the Week – Week 7: Janus Green B

Continuing our new series of chemical recipes, we bring you week 7 – Janus Green B (C30H31CIN6).

Remember that when preparing any of our recipes, you should always wear appropriate PPE.

What is Janus Green B?

Janus Green B is a dye and vital stain (a stain that can be applied to living cells without killing them) that changes colour to indicate the amount of oxygen present in an aqueous solution. A blue colour indicates the presence of oxygen whereas pink indicates absence. Before application, the powder is a dark green/black colour.

It is also known as Union Green B and Diazin Green S, and has been used in surgical and diagnostic procedures involving mitochondria, fungi, nucleic acids and chromosomes, among others.

Click here to view the PDF recipe card to either save to your local files or add it as a bookmark to your browser.

Scan the QR codes for classroom experiments to follow with your safe and prepared Janus Green B.