How to use a reagent test kit?

How to use a reagent test kit: if you intend to use a synthetic psychoactive substance, first you need a test kit to check it for adulterants. Chemicals can’t be identified by appearence. To test use reagent tests like Marquis, Mecke and Froehde in single-use or multiple-use test kits. Using a set with different reagents helps detect adulterants – 90% will react with 1 out of 3 reagents, and 95% with 1 out of 5.

How to test drugs using reagent tests? [BASICS]

Reagents 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.

What test kit do I need?

Any powderprimary test – Marquis
primary test – Froehde
secondary test – Mecke
Blotterprimary test – Ehrlich
secondary test – Hofmann

How should I use a reagent test kit?

BEFORE using a reagent test kit

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

STEP ONE for testing 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 on the sample and wait for the results.

How to use a reagent test kit?


  • Injecting. If you inject you especially need to test each and every dose for fentanyl. It’s best to test the spoon (or cooker) residue.
  • 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).
Safer In Nightlife Reagent Test Kit
Safer In Nightlife Reagent Test Kit

All reagent test kits results

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

Looking where to buy a reagent test kit?


A positive reaction does not indicate if the substance is safe. Learn more at