I have trouble with selecting PLIF(Planar LASER Induced Fluorescence) simulant.

The liquid should have density of around 1400 kg/m^3, not be too viscous, and it should dissolve Rhodamine B well.

Possible candidates, in my search, are very confined I think.

The chloroform may be used; however, its toxicity and evaporation concerned me to use.

Can other liquid be used as simulant?

I would be very appreciative of your kind reply.