How to test HEROIN & OPIOIDS?

To test HEROIN always use more than 1 test, because there are more substances than colors. Tests presumptively indicate PRESENCE, but not PURITY or QUANTITY. A positive or negative test result does not mean, that the substance is safe. No substance is 100% safe.


  1. Crush onto a clean surface (e.g. bottom of a mug) a sample no bigger than a pin head
    PILL – finely crush a small piece, about 1/20th
    BLOTTER – cut no more than 1/10th, the smallest easily visible piece
    LIQUID – Pour a drop on unbleached paper and dry before testing
    PLANT – is good only for testing with fentanyls test strips (or in a laboratory)
  2. In good light pour 1 drop of a test onto your sample We recommend tests included in the HEROIN Test Kit
    SUBSTANCE COLOR might slightly distort results
    A BIGGER SAMPLE can react darker than smaller
  3. Compare the first 10-60 seconds of a reaction with flyers
    FLYERS are available at
    APPS available at for web browsers and Android devices can help interpret results
    RECOMMENDED – record reaction to compare later

Pour baking soda over a finished reaction to neutralize used reagents. Your pipes (and environment) will thank you!Heroin & Opioids Reagent Test Kit Chart

All reactions to test HEROIN

 MARQUIS Reddish Violet
 MECKE Blueish Green
 MANDELIN Red > Dark Brown
 LIEBERMANN Violet > Black
 FROEHDE Violet / Red > Black
 EHRLICH No reaction
 HOFMANN No reaction
 SIMON’S No reaction
 ROBADOPE No reaction
 SCOTT No reaction

A test did (not) react as indicated? Watch out!

If you want to detect an admixture of fentanyls, test heroin (or other street drugs) use test strips. To detect all adulterants try a TLC Kit or laboratory analysis.


Currently, heroin is more and more often laced with fentanyls and other synthetic opioids. Some of these substances are 50-100 stronger than heroin and very easy to overdose on. Unevenly spread powder in a single baggy can be too weak first, and too strong in another part of the sane baggy. If you have even the slightest doubt, test for fentanyls presence using Fentanyls SIN Test.

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