This test won't tell you the substance's identity used for cutting the sample. To find out, we suggest using our EZ Test for Cocaine Cuts. Mix the chemicals, add a small sample, and watch the colours change. Match it to the chart included with the kit. EZ Test White is not fooled by typical substitutes like Mannitol, giving accurate results for cocaine and its family (Lidocaine, Benzocaine, procaine, etc.). Good for one test only.