Mandelin Reagent Test Kit
The Mandelin reagent, unlike Marquis, can determine the presence of Ketamine & PMA/PMMA but also a myriad of other substances making it a useful kit for most substances.
Contains Ammonium Metavanadate in Sulfuric acid, which uniquely is yellow before reacting with an unknown substance
100+ tests per bottle.
Consider upgrading to the Complete Test Kit to narrow down what your sample is.
It’s worth knowing.