Durazol Blue 4R
A dye named durazol blue has been suggested as a replacement for methyl blue in Lendrum’s MSB. It is most likely to be this dye, durazol blue 4R. There is another dye named durazol blue 8G, but it is a copper phthalocyanine and is unlikely to be the dye meant. Unfortunately, the dye was not specifically identified and it is not clear what dye is meant.
Edward Gurr, (1971)
Synthetic dyes in biology, medicine and chemistry
Academic Press, London, England.
Bancroft, J.D. and Stevens A. (1982)
Theory and practice of histological techniques Ed. 2
Churchill Livingstone, Edinburgh & London, UK.