Thank you for clarifying.
Call me a safety nerd if you want, but we had a thread a couple days ago where some fool wanted to chop up lines from 8mg of his t-butyl-phenyl-acetoxy-fent (or whatever). This stuff isn't safe for home use and has little recreational value--it's just a tool to fuck people over.
If you do buy some fent-laced kitty litter online, the only way to use it is stock dilution, or in the lingua franca of Bluelight, volumetric dosing: dilute your entire stock in saline, or some other solvent, so that a single dose is a usable volume.
Really, just opening the package is too dangerous for legitimate stuff--it was an analog of fentanyl the Russians used to gas Chechen terrorists. You don't want to open that in your fucking kitchen.
But if you do, I hope you take a moment to remember your friends who died from overdose due to fent hot shots in their heroin, before making your own fucking hot shots.