How to test HEROIN & OPIOIDS?

How to test heroin & opioids: if you intend to use heroin or other opioids, first you need a heroin test kit to check it for adulterants. Pure heroin can look brown, black or white, and can’t be identified by appearence. To test heroin use reagent tests Marquis, Mecke and Froehde in single-use or multiple-use test kits. To detect fentanyl or test for fentanyl analogs it’s recommended to use fentanyl test strips.

Drug tests presumptively indicate PRESENCE, but not PURITY or QUANTITY. Use different tests to improve accuracy and to detect adulterants – 90% of adulterants will react with 1 out of 3 reagents, and 95% with 1 out of 5.

A positive or negative test result does not indicate if the substance is safe. No substance is 100% safe.


TL;DR: Here is an image with a quick cheat sheet how to use the Heroin Test Kit, or check out more detailed guide on how to test heroin further below.

How to test heroin? Heroin Test Kit Instructions Flowchart
How to test heroin and other opioids? Instructions how to use the Heroin Test Kit with reagent tests Marquis, Mecke and Froehde.

What test kit do I need to test heroin & other opioids?

SAMPLERECOMMENDED HEROIN TEST KIT
Heroin /
other opioids
primary test – Marquis
primary test – Froehde
secondary test – Mecke

recommended test kits:
single-use Heroin Test Kit
multiple-use Heroin Test Kit

How can I test heroin & other opioids?

BEFORE using a heroin test kit

  • It’s RECOMMENDED to record the reaction to compare later

STEP ONE for testing heroin powder / crystal

  • Take and finely crush a small piece, no bigger than a head of a needle – like this •.
  • Put it on a suitable testing plate, preferably a spot test plate or the bottom/underside of a ceramic mug (example). *If using single-use vials insert the sample and observe, as the reagent is already within.
  • Add one (or two) drops of Marquis reagent test (or other supplied) on the sample and wait for the results.
  • Check reagent test results in instructions.

How to use a heroin test kit?

  • Check test results with Marquis test kit: if testing heroin there should be a reddish violet color change reaction.

AFTER using a heroin test kit

  • OPTIONAL: Pour baking soda over a finished reaction to neutralize used reagents.
  • Wash testing surface under running water.

FAQ

  • Fizzing. Any synthetic drug in a form of salt will bubble with most reagent tests, which are strong acids. If you see only fizzing instead of color change, that can indicate presence of a new psychoactive substance.
  • Speed of the reaction does not indicate quantity nor purity. However, if you are having trouble interpreting your result try using a bigger sample or crushing it better before testing.
  • How many tests can you get from one test kit? A multiple-use test kit lasts up to 100 (5 ml) or 200 (10 ml) tests. Each drop equals one test. A single use-test kit contains 2 disposable ampoules (2 tests). One fentanyl test strip is good for 1 test.

All heroin test results:

TESTHEROIN
MARQUISReddish Violet
MECKEBlueish Green
MANDELINRed > Dark Brown
LIEBERMANNViolet > Black
FROEHDEViolet / Red > Black
EHRLICHNo color change
HOFMANNNo color change
SIMON’SNo reaction
ROBADOPENo reaction
SCOTTNo full color change
ZIMMERMANN

Heroin test did not react as indicated? Watch out!
All test results are available in our instructions and TestDrugs apps.

How to check if reagent for testing heroin works?

  • Test any substance and compare color reactions with instructions. It’s easiest to use aspirin – Marquis reagent reacts to it with a slow pink color change.
  • Keep a sample to compare later in case of doubt. If control sample reacts fine, it means the reagent still works.

Looking where to buy a kit for testing heroin?


STEP TWO testing heroin for fentanyl

BEFORE using a fentanyl test strip

  • It’s RECOMMENDED to test each and every dose. Because of extreme potency (microgram range) fentanyl is never evenly mixed in.

STEP ONE for testing fentanyl powder / pills / spice

  • Dissolve 100-200 mg in at least 125 ml of water (half a cup).
  • Grab a test strip by blue end and insert it into the liquid, no higher than the blue line.
  • Wait until liquid starts visibly moving up the test strip (up to 15 seconds).
  • Put the test strip away on a flat dry surface and read the result in 2 minutes.

How to use a fentanyl test strip?

  • Check test strip results: a single line confirms the presence of fentanyl, while two lines (even faint) rule it out.

Fentanyl test did not react as indicated? Watch out!
All test results are available in our instructions and TestDrugs apps.

FAQ

  • Faint line. Even faint second line result is enough to rule out the presence of fentanyl.
  • Injecting. If you inject you especially need to test each and every dose. It’s best to test the spoon (or cooker) residue every time before use.
  • Speed of the reaction does not indicate quantity nor purity. However, if you are having trouble interpreting your result try using a bigger sample or crushing it better before testing.
  • How many tests can you get from one test kit? A single fentanyl test strip is enough for one test.

Looking where to buy a test kit for fentanyl?


List of all SIN guides how to test drugs:

How to test 2C-B?
How to test MDA?
How to test MDMA?
How to test LSD?
How to test DMT?
How to test FENTANTYL?
How to test COCAINE?
How to test MESCALINE?
How to test KETAMINE?
How to test MEPHEDRONE?
How to test AMPHETAMINE?
How to test METHAMPHETAMINE?
How to test HEROIN & OPIOIDS?
How to test an UNKOWN substance or RCs?

and how to detect cuts or other adulterants:

How to detect LEVAMISOLE?
How to detect PMA/PMMA?
How to detect FENTANYL?
How to detect NBOMes?

HARM REDUCTION

A positive reaction does not indicate if the substance is safe. Heroin is often laced with fentanyl or other synthetic opioids. Some of these substances are 50-100 stronger than heroin and extremely easy to overdose on. Unevenly spread powder can be too weak at first, and too strong in another part of the same baggy. If you have even the slightest doubt, test for fentanyls using SIN Fentanyl Test Strips. Learn more at erowid.org.   

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