Lee Ann,
                    azure B is an oxidation product of methylene blue and
in solution will itself
become further oxidized over time in sequence to azure IV, A, C, and
methylene violet etc.
I would recommend that if you are going to use this that you purchase the
dye powder and make the
solution yourself.
Could you let us know what you are going to use this for as for many
applications you can also
substitute polychome methylene blue.
Thanks
Barry


Lee Ann Baldridge wrote:

> Happy New Year to All!!
> Does anyone have an idea where our lab might purchase Azure B ready made?
>Thanks for the help.
>
> Lee Ann Baldridge
> IU Hosp.
> Indpls., IN
> 317-274-5790
> fax 317-278-4820