In recent years, some cocaine in the market can be defiled with substances such as levamisole (an anti-worm medicine for horses or cows), phenacetin (an old-school painkiller), or ephedrine (an inexpensive stimulant). This simple test will allow you to detect these substances and know if cocaine has been “cut” with something.
This test doesn’t show actual amounts of contaminants, it simply determines whether or not there are additives in cocaine. It doesn’t react with the cocaine itself. If you want to determine cocaine purity – consider getting a cocaine purity test. If you want to determine whether or not this is cocaine – get a cocaine test.