Common cheap field drug tests commonly react to (yield substance-positive results) to other substances such as powdered sugar, human ashes, some foodstuffs and plastics.

Normally an additional sample is supposed to be sent to a lab for more specific results, but the courts in most states accept the field tests as definitive. A positive result is definitely probable cause, which allows officers to search your vehicle or home and take your money and solvent assets, as per asset forfeiture.

But yes, you can expect common substances to be grounds for a drug trafficking charge. Is an execution summary (id est, on sight)?