How to test “SPECIAL K”?

How to test ketamine: if you intend to use ketamine, first you need a ketamine test kit to check it for adulterants. Pure ketamine is white or off-white and can’t be identified by appearence. To test ketamine use reagent tests Mandelin, Mecke, Liebermann 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 Ketamine Test Kit, or check out more detailed guide on how to test methamphetamine further below.

Ketamine Testing Kit Chart
How to test ketamine? Instructions how to use the Ketamine Test Kit with reagent tests Mecke, Liebermann, Mandelin and Froehde.

What test kit do I need to test ketamine?

~ Ketamine ~primary test – Mandelin
secondary test – Mecke
secondary test – Liebermann
secondary test – Froehde
recommended test kits:
single-use Ketamine Test Kit
multiple-use Ketamine Test Kit

How can I test ketamine?

BEFORE using a ketamine test kit

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

STEP ONE for testing ketamine powder / crystals

  • 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 Mandelin reagent test (or other supplied) on the sample and wait for the results.
  • Check reagent test results in instructions.

How to use a ketamine test kit?

  • Check test results starting with Mandelin test kit: if testing ketamine the color change reaction should go from orange to brown.
Instructions how to test ketamine using Mecke and Mandelin reagent tests
How to test ketamine? Testing ketamine with using Mecke reagent (left, no color change) and Mandelin (yellow/orange turning brown) included in the Ketamine Test Kit.

STEP TWO testing ketamine for adulterants  

According to the EMCDDA most common ketamine adulterants are caffeine, creatine and novel dissociatives. The latter can be detected with reagents.

  • Try reagents that that should NOT change color with ketamine: Marquis, Mecke, Froehde, Robadope (for 2C-x, amphetamine, MDA or PMA), Simon’s (for cathinones, methamphetamine, MDMA or PMMA) or Zimmermann (for a-PVP and 4-MMC derivatives).
  • Liebermann reagent can also be useful – ketamine should react with a yellow color change.
  • Keep in mind that various non active cuts can impact the reagent tests results.

AFTER using a ketamine test kit

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


  • Liquid. Evaporate the solvent before testing with reagents.
  • 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).

All ketamine test results:

MARQUISNo color change
MECKENo color change
MANDELINOrange > Brown
FROEHDENo color change
EHRLICHNo color change
HOFMANNNo color change
SIMON’SNo reaction
ROBADOPENo reaction
SCOTTNo full color change

Ketamine 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 ketamine works?

  • Test any substance and compare color reactions with instructions. It’s easiest to use vitamine C – Mandelin reagent reacts to it with a blue 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 ketamine?

How to detect 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.


  • 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 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?


A positive reaction does not indicate if the substance is safe. Remember to avoid mixing with other drugs, take care of yourself and take breaks. Ketamine can be habit forming and is known to cause bladder damage in those cases, therefore regular use can be particularly dangerous. Learn more at

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