its not pure naphtha, it has a mix of aromatic hydrocarbons (like xylene) and some things I dont know what they are.. This definitely wont work for freeze precipitation, only evaporation.  I would personally avoid using that to be honest, and try to get some pure naphtha or even better (but a bit more complicated)  is to make food-safe teks using limonene as a solvent instead

if you cant find anything else, at least do an evap test on the solvent first (put some of the solvent in a glass dish and see if it evaps clean or if it leaves any residue. if it leaves residue, dont use it)