These dyes are hard to get and run about $100 - $200 / gram (US). To save money and effort, I use erythrosine, which is a food dye and is about $20 / gram and can be bought from most chemical supply houses.

It is very very low in toxicity.

It will give you an ortho sensitive emulsion when coated on film.

If you want to know about modern dyes used by Kodak and other companies, there is a good description in Mees, or Mees and James. They include structures and spectra. I have posted some of the spectra here and mentioned erythrosine several times. If you search for it, you will find the wedge spectrograms.

PE