CANNABIS Reagent Test Kit


Discreet packaging, with no mention of “SIN”. SAME DAY shipping for all purchases before 11 GMT.

  • 1 Bottle of CANNABIS A reagent + 1 bottle of CANNABIS B  (40/80 uses)
  • 2 Gloves, instructions

*For testing THC % see the full CBD & THC Test Kit



By purchasing SIN Cannabis Reagent Test Kit you support our fight for drug policy based on harm reduction, human rights, and facts, not prejudice.



Cannabis reagent is a 2 part test used by Swiss police to distinguish legal cannabis (CBD dominant) from illegal (THC dominant). It is used to positively identify THC or CBD and to rule out different, syntethic, less predictable and less desirable, highly toxic dangerous drugs. With special accessories included in the CBD & THC Test Kit this reagent can albo be used to test THC potency of herbs, hashish or other extracts and foods.

SIN Cannabis Reagent Test Kit includes gloves, instructions and 2 reagent bottles. High-quality HDPE protects reagents from air and moisture to ensure prolonged shelf life. Special dropper guarantees 0 spills, to pour a drop gently squeeze the bottle. Every bottle contains 5 or 10 ml, with each 5 drops accounting for 1 use.

The Cannabis reagent is a mixture of propanol, water, hydrochloric acid, sodium hydroxide and dye. On its own it is colorless. It’s best to use this test kit for marijuana (dry herbs) or hashish and other extracts, but it’s also good for fresh flowers, cakes and other cannabis products.

NOTE: Cannabis reagent deteriorates with time, especially if exposed to sunlight or not refrigerated. If you are uncertain whether the reagent will work for THC or CBD, test it with a previously checked sample.

Expected cannabis reagent test results:

  • Yellow – <5% THC
  • Green – 5-10% THC
  • Blue – 10-20% THC
  • Deep blue – 20+% THC
  • Pink / Purple – CBD dominant
CBD / THC Color Change
Testing THC / CBD using Cannabis reagents. The same kit used for testing THC is recomended for testing CBD. Above picture is an ilustration and does not include full results color scale.

Are you still looking for the best reagent test kit? See more HERE.    



NOTE: Cannabis reagent can only test the PRESENCE or QUANTITY, not PURITY of a specific substance. For best results test CBD or THC potency by comparing samples side-by-side.

How to use the cannabinoids test kit?

  • Test potency of dry or wet cannabis flowers.
  • Test potency of cannabis oils and other extracts.
  • Compare THC potency with old samples: test results don’t fade.
  • Check for presence of THC to help rule out presence of dangerous adulterants.

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

CBD / THC Potency Testing Kit Instructions
Instructions how to use the Cannabis Test Kit. This is the same instruction chart for as in CBD & THC Test Kit or in the guide How to test THC & CBD.

How can I test cannabis?

BEFORE using a cannabinoids reagent test kit

  • Prepare:
    • good scale
    • representative sample 
    • odczynniki Cannabis
    • płyn Solvent (rozpuszczalnik)
    • Glass Vial
    • Plastic Bottle
    • 1 Pipette
    • 1 plastic Test Vial
  • Weigh. Inside a Glass Vial weigh 100 mg (uncrushed plant material) or 40 mg (extracts). Do not close the Glass Vial.

(2) STEP TWO: heating (decarboxylation)

  • Pre heat an oven to 110 °C. Put the open Glass Vial with weighted sample onto a middle rack in the oven. Remove after 60 minutes (30 if using a vacuum oven).

(3) STEP THREE: dissolving

  • Crush herbal sample in Glass Vial with a clean tool, e.g. a toothpick.
  • Use clean pipette to add 4 ml of the Solvent. Close the Glass Vial lid and shake well. Wait 2 minutes.

(4) STEP FOUR: diluting

  • Using pipette add Solvent into a Plastic Dropper Bottle (1,5 ml for herbs or 3,5 ml for extracts).
  • Next with the same pipette add 0,5 ml of the dissolved sample from Glass Vial. to Plastic Bottle.
  • Close the Plastic Bottle firmly, so that the dropper from inside the cap secures itself in place.

(5) STEP FIVE: test it!

  • Open reagents Cannabis A and B and put caps down so they don’t mix.
  • Squeeze 1 drop out of Plastic Bottle into a Test Vial. Add 5 drops of Cannabis Aimmiedietly followed by 5 drops of Cannabis Reagent B. Close the Test Tube and shake briefly.
  • Check results after 60 minutes. Observe test results from a side, with Test Tube half-standing on a white flat surface.
  • Extracts’ results should be multiplied by 5, e.g. 8% means around 40%.
Color Change Results
How to test THC / CBD? Color change results under daylight (top), photographic light (bottom left) and phone camera flash light (bottom right). The deeper the shade of blue, the bigger the amount of THC. Green and yellow hues mean proportionally smaller potency.

AFTER using the Cannabis Test Kit

  • Wash used accessories first with a solvent and next under running water.


  • Cannabis B. If testing potency, it is very important to immiedietly add 5 drops of Cannabis reagent B after adding 5 drops of Cannabis reagent A.
  • No reaction. If your sample does not react, that indicates no presence of THC or CBD, or an error while performing the test. Did you add 5 drops of reagent B immiedietly after 5 drops of A?
  • Color change. Observe results in daylight, from a side, with Test Tubes half-standing on flat white surface. Try to compare samples with each other.
  • How many THC % tests can you get from one test kit? A single 5 ml bottle is enough for 40 potency tests and 10 ml is enough for 80.


How to check if reagent for testing cannabis works?

  • Test legal hemp and compare color reactions with instructions.
  • 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 different reagent test?


SIN THC Potency Test was calibrated using reference standards and TLC:

Results of the reagent calibrated by SIN are proportional to results of thin layer chromatography Alpha-CAT test. Taking into account various factors, such as different light, experience etc. we estimate a 3% error margin.

Reagent Test Kit Calibration with Alpha-CAT TLC set
SIN CBD & THC test kit was calibrated with Alpha-CAT test. For thin-layer chromatography tests results must be multiplied by two. Ratios of different samples are consistent between the tests.



Reagents contain hydrochloric acid and other harmfull chemicals. Keep out of eyes and mouth. Keep away from children. Always use in a well-ventilated area. Wear gloves (supplied) when handling the bottle and cap. Wear protective eyewear. Never point towards face etc. If you get some on you/clothing, then immediately wash with soap and water. Wash testing surfaces with soap and water as well. Dispose of any unwanted reagent down the sink with running water and baking soda (supplied), ventilate. Store all testing kits away from any heat in a cool, dark place between uses. The average shelf life of 1 year can be significantly extended by storing in a freezer (warm to room temperature before use).

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

Additional information

Weight 0.28 kg

Refill 5ml (~100 tests), Refill 10ml (~200 tests), Set 5ml (~100 tests), Set 10ml (~200 tests)


5ml (~100 tests), 10ml (~200 tests)

Shelf life

12 months +


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