Heroin Reagent Test includes Froehde reagent best for heroin or other opioids but also suitable for meth/amphetamines, MDxx and more. It is used to positively identify heroin, morphine, codeine, oxycodone and to rule out different, less predictable, less desirable, highly toxic dangerous drugs. Multiple reagents are required to detect adulterants and increase analysis precision. To detect fentanyl it is required to use a fentanyl test strip.
Reagent tests can indicate PRESENCE, but not PURITY or QUANTITY. Mixtures can be detected with reagents only if adulterant causes a darker color change than the expected substance.