Supplied in amber glass bottles.
 
Azure A (Mach Neal) C.I. is a synthetic dye with a CAS number of 531-55-5 and a molecular weight of 320.87 g/mol.
 
This dye is commonly used in histology and microscopy studies as a counterstain to hematoxylin. It can also be used to stain bacterial spores and fungal hyphae.
 
For more information on the use of Azure A (Mach Neal) C.I., please refer to the PubMed article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3110581/.