Might fluorescent dyes like Fluorescein disodium or Kiton Red change the boiling point of the solvent?

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Adam B Shapiro

It is very unlikely unless the dye concentration is very high relative to the concentrations of fluorophores that are normally used.

https://en.wikipedia.org/wiki/Boiling-point_elevation

Simon Janich

Technically, every solute does affect the boiling point, but as Adam B Shapiro mentioned, you'll need a significant amount to have a noticeable effect.